<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Labels Linkbase, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 3 -->
<!-- Creation date: 2013-03-01T03:42:48Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley &amp; Sons Company All Rights Reserved. -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedLiabilitiesMember_lbl" xml:lang="en-US" id="id_758292_504935_2_1">Other Accrued Liabilities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_758292_513924_1_1">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_758292_513924_2_1">Less: accumulated depreciation and amortization</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xml:lang="en-US" id="id_758292_518728_3_1">Accumulated Other Comprehensive Income (Loss) [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xml:lang="en-US" id="id_758292_518728_1_1">Accumulated Other Comprehensive Income Loss [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xml:lang="en-US" id="id_758292_518728_2_1">Accumulated Other Comprehensive Income (Loss) [Line Items]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US" id="id_758292_510963_1_1">Accumulated Other Comprehensive Income Loss Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US" id="id_758292_510963_2_1">Accumulated other comprehensive (loss) income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US" id="id_758292_510963_6_1">Total accumulated other comprehensive income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US" id="id_758292_510963_12_1">Accumulated other comprehensive income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xml:lang="en-US" id="id_758292_541739_3_1">Accumulated Other Comprehensive Income (Loss) [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xml:lang="en-US" id="id_758292_541739_1_1">Accumulated Other Comprehensive Income Loss [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xml:lang="en-US" id="id_758292_541739_2_1">Accumulated Other Comprehensive Income (Loss) [Table]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US" id="id_758292_500724_1_1">Accumulated Other Comprehensive Income [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US" id="id_758292_500724_2_1">Accumulated Other Comprehensive (Loss) Income</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetAmount" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetAmount_lbl" xml:lang="en-US" id="id_758292_499171_1_1">Acquired Finite Lived Intangible Asset Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetAmount_lbl" xml:lang="en-US" id="id_758292_499171_2_1">Total intangible assets, fair value</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_758292_508619_1_1">Additional Paid In Capital [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentForAmortization_lbl" xml:lang="en-US" id="id_758292_510690_1_1">Adjustment For Amortization</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdvertisingCostsPolicyTextBlock" xlink:label="us-gaap_AdvertisingCostsPolicyTextBlock"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdvertisingExpense_lbl" xml:lang="en-US" id="id_758292_506636_1_1">Advertising Expense</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AggregatePurchaseCommitments_lbl" xml:lang="en-US" id="id_758292_594494_3_1">Aggregate purchase commitments.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsMember_lbl" xml:lang="en-US" id="id_758292_500424_1_1">Allowance For Doubtful Accounts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsMember_lbl" xml:lang="en-US" id="id_758292_500424_2_1">Allowance for Doubtful Accounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsMember" xlink:to="us-gaap_AllowanceForDoubtfulAccountsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_758292_512302_1_1">Allowance For Doubtful Accounts Receivable Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_758292_512302_2_1">Accounts receivable, less allowance for doubtful accounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_758292_497723_1_1">Amendment Flag</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_758292_497723_2_1">Amendment Flag</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AmericanTaxpayerReliefActOfTwentyTwelveMember" xlink:label="ter_AmericanTaxpayerReliefActOfTwentyTwelveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AmericanTaxpayerReliefActOfTwentyTwelveMember_lbl" xml:lang="en-US" id="id_758292_688708_3_1">American Taxpayer Relief Act of Twenty Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AmericanTaxpayerReliefActOfTwentyTwelveMember_lbl" xml:lang="en-US" id="id_758292_688708_1_1">American Taxpayer Relief Act Of Twenty Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AmericanTaxpayerReliefActOfTwentyTwelveMember_lbl" xml:lang="en-US" id="id_758292_688708_2_1">American Taxpayer Relief Act of Twenty Twelve</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xml:lang="en-US" id="id_758292_512565_1_1">Amortization Of Debt Discount Premium</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xml:lang="en-US" id="id_758292_512565_2_1">Amortization of the discount component and debt issue fees recognized as interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="us-gaap_AmortizationOfIntangibleAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US" id="id_758292_514196_1_1">Amortization Of Intangible Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US" id="id_758292_514196_32_1">Aggregate intangible asset amortization expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US" id="id_758292_514196_2_1">Acquired intangible asset amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US" id="id_758292_514196_12_1">Acquired intangible assets amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfIntangibleAssets" xlink:to="us-gaap_AmortizationOfIntangibleAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AntidilutionAdjustmentsOfConvertibleNoteHedges" xlink:label="ter_AntidilutionAdjustmentsOfConvertibleNoteHedges"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AntidilutionAdjustmentsOfConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594519_3_1">Antidilution adjustments of convertible note hedges.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AntidilutionAdjustmentsOfConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594519_1_1">Antidilution Adjustments Of Convertible Note Hedges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AntidilutionAdjustmentsOfConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594519_2_1">Antidilution adjustments, shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="ter_AntidilutionAdjustmentsOfConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594519_12_1">Shares that would be issued upon conversion</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US" id="id_758292_512699_1_1">Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US" id="id_758292_512699_2_1">Computation of diluted net income per common excluding the effect of the potential exercise of stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AsAdjustedMember" xlink:label="ter_AsAdjustedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AsAdjustedMember_lbl" xml:lang="en-US" id="id_758292_594764_3_1">As Adjusted [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AsAdjustedMember_lbl" xml:lang="en-US" id="id_758292_594764_1_1">As Adjusted [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AsAdjustedMember_lbl" xml:lang="en-US" id="id_758292_594764_2_1">As Adjusted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_AsAdjustedMember" xlink:to="ter_AsAdjustedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="us-gaap_AssetBackedSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetBackedSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_502761_1_1">Asset Backed Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetBackedSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_502761_2_1">Asset-backed Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetBackedSecuritiesMember" xlink:to="us-gaap_AssetBackedSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue" xlink:label="us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue_lbl" xml:lang="en-US" id="id_758292_499163_1_1">Asset Retirement Obligation Legally Restricted Assets Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue_lbl" xml:lang="en-US" id="id_758292_499163_2_1">Fair Value of assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue" xlink:to="us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_758292_507639_1_1">Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_758292_507639_2_1">Total assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_758292_507639_6_1">Total assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_758292_498468_1_1">Assets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_758292_498468_2_1">ASSETS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_758292_513098_1_1">Assets Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_758292_513098_6_1">Total current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_758292_513511_1_1">Assets Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_758292_513511_2_1">Current assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_508331_1_1">Assets Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_508331_2_1">Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_508331_12_1">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems" xlink:label="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems_lbl" xml:lang="en-US" id="id_758292_518765_3_1">Assumed Health Care Cost Trend Rates, Effect of One Percentage Point Change [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems_lbl" xml:lang="en-US" id="id_758292_518765_1_1">Assumed Health Care Cost Trend Rates Effect Of One Percentage Point Change [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems_lbl" xml:lang="en-US" id="id_758292_518765_2_1">Assumed Health Care Cost Trend Rates, Effect of One Percentage Point Change [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems" xlink:to="ter_AssumedHealthCareCostTrendRatesEffectOfOnePercentagePointChangeLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AvailableForSaleSecuritiesFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_514821_2_1">Available for sale securities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice_lbl" xml:lang="en-US" id="id_758292_509028_1_1">Business Acquisition Cost Of Acquired Entity Purchase Price</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_BusinessAcquisitionInventoryFairValueAdjustment" xlink:label="ter_BusinessAcquisitionInventoryFairValueAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_BusinessAcquisitionInventoryFairValueAdjustment_lbl" xml:lang="en-US" id="id_758292_594696_3_1">Business Acquisition Inventory Fair Value Adjustment.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xml:lang="en-US" id="id_758292_503555_1_1">Business Acquisition [Line Items]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_lbl" xml:lang="en-US" id="id_758292_501044_1_1">Business Acquisition Pro Forma Earnings Per Share Basic</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_lbl" xml:lang="en-US" id="id_758292_514743_1_1">Business Acquisition Pro Forma Earnings Per Share Diluted</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_lbl" xml:lang="en-US" id="id_758292_507206_1_1">Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_lbl" xml:lang="en-US" id="id_758292_507206_2_1">Income from continuing operations per common share, basic</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:to="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_lbl" xml:lang="en-US" id="id_758292_514556_1_1">Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_BusinessAcquisitionProFormaInformationLineItems" xlink:label="ter_BusinessAcquisitionProFormaInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_BusinessAcquisitionProFormaInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518723_3_1">Business Acquisition, Pro Forma Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_BusinessAcquisitionProFormaInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518723_1_1">Business Acquisition Pro Forma Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_BusinessAcquisitionProFormaInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518723_2_1">Business Acquisition, Pro Forma Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_BusinessAcquisitionProFormaInformationLineItems" xlink:to="ter_BusinessAcquisitionProFormaInformationLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_BusinessAcquisitionProFormaInformationTable_lbl" xml:lang="en-US" id="id_758292_541664_1_1">Business Acquisition Pro Forma Information [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_BusinessAcquisitionProFormaInformationTable_lbl" xml:lang="en-US" id="id_758292_541664_2_1">Business Acquisition, Pro Forma Information [Table]</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities" xlink:label="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities_lbl" xml:lang="en-US" id="id_758292_594547_3_1">Business acquisition purchase price allocation current assets cash, cash equivalents and short term marketable securities.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities_lbl" xml:lang="en-US" id="id_758292_594547_1_1">Business Acquisition Purchase Price Allocation Current Assets Cash Cash Equivalents And Short Term Marketable Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities_lbl" xml:lang="en-US" id="id_758292_594547_2_1">Cash, cash equivalents and short term marketable securities</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US" id="id_758292_499327_1_1">Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US" id="id_758292_499327_2_1">Other current assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable_lbl" xml:lang="en-US" id="id_758292_510382_1_1">Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable_lbl" xml:lang="en-US" id="id_758292_510382_8_1">Accounts payable and current liabilities</label>
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    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_500579_8_1">Long-term deferred tax liabilities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_lbl" xml:lang="en-US" id="id_758292_504032_1_1">Business Acquisition Purchase Price Allocation Goodwill Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_lbl" xml:lang="en-US" id="id_758292_504032_2_1">Goodwill</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities_lbl" xml:lang="en-US" id="id_758292_508580_1_1">Business Acquisition Purchase Price Allocation Noncurrent Liabilities</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities_lbl" xml:lang="en-US" id="id_758292_508580_8_1">Other long-term liabilities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl" xml:lang="en-US" id="id_758292_497958_1_1">Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl" xml:lang="en-US" id="id_758292_497958_2_1">Income from continuing operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" xlink:to="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_lbl" xml:lang="en-US" id="id_758292_512403_1_1">Business Acquisitions Pro Forma Net Income Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_lbl" xml:lang="en-US" id="id_758292_512403_2_1">Net income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:to="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xml:lang="en-US" id="id_758292_501428_1_1">Business Acquisitions Pro Forma Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xml:lang="en-US" id="id_758292_501428_2_1">Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:to="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_BusinessAcquisitionTable" xlink:label="ter_BusinessAcquisitionTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_BusinessAcquisitionTable_lbl" xml:lang="en-US" id="id_758292_572118_3_1">Business Acquisition [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_BusinessAcquisitionTable_lbl" xml:lang="en-US" id="id_758292_572118_1_1">Business Acquisition [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_BusinessAcquisitionTable_lbl" xml:lang="en-US" id="id_758292_572118_2_1">Business Acquisition [Table]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationAcquisitionRelatedCosts_lbl" xml:lang="en-US" id="id_758292_504069_1_1">Business Combination Acquisition Related Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessCombinationAcquisitionRelatedCosts_lbl" xml:lang="en-US" id="id_758292_504069_2_1">Acquisition charges</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_500937_1_1">Business Combination Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_500937_2_1">ACQUISITIONS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationDisclosureTextBlock" xlink:to="us-gaap_BusinessCombinationDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessExitCosts" xlink:label="us-gaap_BusinessExitCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessExitCosts_lbl" xml:lang="en-US" id="id_758292_512710_1_1">Business Exit Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessExitCosts_lbl" xml:lang="en-US" id="id_758292_512710_2_1">Early exit of leased facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessExitCosts" xlink:to="us-gaap_BusinessExitCosts_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CallOptionShares" xlink:label="ter_CallOptionShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CallOptionShares_lbl" xml:lang="en-US" id="id_758292_594602_3_1">Call Option, Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CallOptionShares_lbl" xml:lang="en-US" id="id_758292_594602_1_1">Call Option Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CallOptionShares_lbl" xml:lang="en-US" id="id_758292_594602_2_1">Call option, shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CallOptionShares" xlink:to="ter_CallOptionShares_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember_lbl" xml:lang="en-US" id="id_758292_499190_1_1">Carrying Reported Amount Fair Value Disclosure [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember_lbl" xml:lang="en-US" id="id_758292_499190_2_1">Carrying Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:to="us-gaap_CarryingReportedAmountFairValueDisclosureMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_758292_510062_1_1">Cash And Cash Equivalents At Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_758292_510062_4_1">Cash and cash equivalents at end of year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_758292_510062_5_1">Cash and cash equivalents at beginning of year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_758292_510062_2_1">Cash and cash equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_758292_510062_12_1">Cash and cash equivalents, Carrying Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_507532_1_1">Cash And Cash Equivalents Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_507532_2_1">Cash and Cash equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_507532_12_1">Cash and cash equivalents, Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsMember_lbl" xml:lang="en-US" id="id_758292_508392_1_1">Cash And Cash Equivalents [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsMember_lbl" xml:lang="en-US" id="id_758292_508392_2_1">Cash and Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsMember" xlink:to="us-gaap_CashAndCashEquivalentsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_505888_1_1">Cash And Cash Equivalents Period Increase Decrease</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_505888_2_1">Decrease in cash and cash equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_505888_6_1">(Decrease) increase in cash and cash equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashEquivalentsMember_lbl" xml:lang="en-US" id="id_758292_512588_1_1">Cash Equivalents [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashEquivalentsMember_lbl" xml:lang="en-US" id="id_758292_512588_2_1">Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashEquivalentsMember" xlink:to="us-gaap_CashEquivalentsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashMember" xlink:label="us-gaap_CashMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashMember_lbl" xml:lang="en-US" id="id_758292_501039_1_1">Cash [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashMember_lbl" xml:lang="en-US" id="id_758292_501039_2_1">Cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashMember" xlink:to="us-gaap_CashMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CashPaidDuringPeriodForAbstract" xlink:label="ter_CashPaidDuringPeriodForAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CashPaidDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_758292_518553_3_1">Cash Paid During Period For [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CashPaidDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_758292_518553_1_1">Cash Paid During Period For [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CashPaidDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_758292_518553_2_1">Cash paid during the year for:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations" xlink:label="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_500280_1_1">Cash Provided By Used In Investing Activities Discontinued Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_500280_2_1">Net cash provided by discontinued operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations" xlink:to="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_500528_1_1">Cash Provided By Used In Operating Activities Discontinued Operations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_500528_12_1">Net cash provided by discontinued operations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CertificatesOfDepositMember_lbl" xml:lang="en-US" id="id_758292_501363_1_1">Certificates Of Deposit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CertificatesOfDepositMember_lbl" xml:lang="en-US" id="id_758292_501363_2_1">Certificates Of Deposit And Time Deposits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CertificatesOfDepositMember" xlink:to="us-gaap_CertificatesOfDepositMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ChangeInAccountingPrincipleAxis" xlink:label="ter_ChangeInAccountingPrincipleAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ChangeInAccountingPrincipleAxis_lbl" xml:lang="en-US" id="id_758292_594378_3_1">Change In Accounting Principle [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ChangeInAccountingPrincipleAxis_lbl" xml:lang="en-US" id="id_758292_594378_1_1">Change In Accounting Principle [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ChangeInAccountingPrincipleAxis_lbl" xml:lang="en-US" id="id_758292_594378_2_1">Change In Accounting Principle</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ChangeInAccountingPrincipleAxis" xlink:to="ter_ChangeInAccountingPrincipleAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ChangeInAccountingPrincipleDomain" xlink:label="ter_ChangeInAccountingPrincipleDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ChangeInAccountingPrincipleDomain_lbl" xml:lang="en-US" id="id_758292_594495_3_1">Change In Accounting Principle [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ChangeInAccountingPrincipleDomain_lbl" xml:lang="en-US" id="id_758292_594495_1_1">Change In Accounting Principle [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ChangeInAccountingPrincipleDomain_lbl" xml:lang="en-US" id="id_758292_594495_2_1">Change In Accounting Principle [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ChangeInAccountingPrincipleDomain" xlink:to="ter_ChangeInAccountingPrincipleDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ChangeInAccountingPrincipleLineItems_lbl" xml:lang="en-US" id="id_758292_594770_3_1">Change in Accounting Principle [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ChangeInAccountingPrincipleLineItems_lbl" xml:lang="en-US" id="id_758292_594770_1_1">Change In Accounting Principle [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ChangeInAccountingPrincipleLineItems_lbl" xml:lang="en-US" id="id_758292_594770_2_1">Change In Accounting Principle</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ChangeInAccountingPrincipleLineItems" xlink:to="ter_ChangeInAccountingPrincipleLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="us-gaap_ChangeInAccountingPrincipleMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ChangeInAccountingPrincipleMember_lbl" xml:lang="en-US" id="id_758292_503179_1_1">Change In Accounting Principle [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ChangeInAccountingPrincipleMember_lbl" xml:lang="en-US" id="id_758292_503179_2_1">Adjustments for Change in Accounting Principle [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInAccountingPrincipleMember" xlink:to="us-gaap_ChangeInAccountingPrincipleMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ChangeInAccountingPrincipleTextBlock" xlink:label="ter_ChangeInAccountingPrincipleTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ChangeInAccountingPrincipleTextBlock_lbl" xml:lang="en-US" id="id_758292_594585_3_1">Change In Accounting Principle [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ChangeInAccountingPrincipleTextBlock_lbl" xml:lang="en-US" id="id_758292_594585_1_1">Change In Accounting Principle [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ChangeInAccountingPrincipleTextBlock_lbl" xml:lang="en-US" id="id_758292_594585_2_1">CHANGE IN ACCOUNTING PRINCIPLE</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ChangeInAccountingPrincipleTextBlock" xlink:to="ter_ChangeInAccountingPrincipleTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue" xlink:label="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue_lbl" xml:lang="en-US" id="id_758292_521575_3_1">Change Of Business Acquisition Contingent Consideration At Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue_lbl" xml:lang="en-US" id="id_758292_521575_1_1">Change Of Business Acquisition Contingent Consideration At Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue_lbl" xml:lang="en-US" id="id_758292_521575_2_1">Business acquisition, contingent consideration</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue" xlink:to="ter_ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_CN" xlink:label="country_CN"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_CN_lbl" xml:lang="en-US" id="id_758292_497454_1_1">C N</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_CN_lbl" xml:lang="en-US" id="id_758292_497454_2_1">CHINA</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_CN" xlink:to="country_CN_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="us-gaap_CommercialPaperMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommercialPaperMember_lbl" xml:lang="en-US" id="id_758292_500848_1_1">Commercial Paper [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommercialPaperMember_lbl" xml:lang="en-US" id="id_758292_500848_2_1">Commercial Paper</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialPaperMember" xlink:to="us-gaap_CommercialPaperMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_758292_501924_1_1">Commitments And Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_758292_501924_2_1">Commitments and contingencies (Note L)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CommitmentsAndContingenciesDisclosureLineItems" xlink:label="ter_CommitmentsAndContingenciesDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518744_3_1">Commitments and Contingencies Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518744_1_1">Commitments And Contingencies Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518744_2_1">Commitments and Contingencies Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="ter_CommitmentsAndContingenciesDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CommitmentsAndContingenciesDisclosureTable" xlink:label="ter_CommitmentsAndContingenciesDisclosureTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541670_3_1">Commitments and Contingencies Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541670_1_1">Commitments And Contingencies Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541670_2_1">Commitments and Contingencies Disclosure [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CommitmentsAndContingenciesDisclosureTable" xlink:to="ter_CommitmentsAndContingenciesDisclosureTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_512236_1_1">Commitments And Contingencies Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_512236_2_1">COMMITMENTS AND CONTINGENCIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CommonSharesAttributableToConversionOfDebtInstrument" xlink:label="ter_CommonSharesAttributableToConversionOfDebtInstrument"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CommonSharesAttributableToConversionOfDebtInstrument_lbl" xml:lang="en-US" id="id_758292_594947_3_1">Common Shares Attributable To Conversion Of Debt Instrument</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CommonSharesAttributableToConversionOfDebtInstrument_lbl" xml:lang="en-US" id="id_758292_594947_1_1">Common Shares Attributable To Conversion Of Debt Instrument</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CommonSharesAttributableToConversionOfDebtInstrument_lbl" xml:lang="en-US" id="id_758292_594947_2_1">Initial conversion rate in number of shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CommonSharesAttributableToConversionOfDebtInstrument" xlink:to="ter_CommonSharesAttributableToConversionOfDebtInstrument_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CommonStockFairMarketValuePercentage" xlink:label="ter_CommonStockFairMarketValuePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CommonStockFairMarketValuePercentage_lbl" xml:lang="en-US" id="id_758292_629131_3_1">Common Stock Fair Market Value Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CommonStockFairMarketValuePercentage_lbl" xml:lang="en-US" id="id_758292_629131_1_1">Common Stock Fair Market Value Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CommonStockFairMarketValuePercentage_lbl" xml:lang="en-US" id="id_758292_629131_2_1">Fair market value common stock price percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CommonStockFairMarketValuePercentage" xlink:to="ter_CommonStockFairMarketValuePercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_758292_501348_1_1">Common Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_758292_501348_2_1">Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_758292_512817_1_1">Common Stock Par Or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_758292_512817_2_1">Common stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_758292_502587_1_1">Common Stock Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_758292_502587_2_1">Common stock, shares authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_758292_510226_1_1">Common Stock Shares Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_758292_510226_2_1">Common stock, shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_758292_504150_1_1">Common Stock Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_758292_504150_2_1">Common stock, shares outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US" id="id_758292_512456_1_1">Common Stock Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US" id="id_758292_512456_2_1">Common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US" id="id_758292_512456_12_1">Common stock, $0.125 par value, 1,000,000 shares authorized, 187,908 and 183,587 shares issued and outstanding at December 31, 2012 and 2011, respectively</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ComponentsOfConvertibleSeniorNotesTableTextBlock" xlink:label="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594891_3_1">Components Of Convertible Senior Notes [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594891_1_1">Components Of Convertible Senior Notes Table [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594891_2_1">Components of Convertible Senior Notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock" xlink:to="ter_ComponentsOfConvertibleSeniorNotesTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ComprehensiveIncomeLossPolicyTextBlock" xlink:label="ter_ComprehensiveIncomeLossPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ComprehensiveIncomeLossPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_554416_3_1">Comprehensive Income Loss [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ComprehensiveIncomeLossPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_554416_1_1">Comprehensive Income Loss Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ComprehensiveIncomeLossPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_554416_2_1">Comprehensive Income (Loss)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ComprehensiveIncomeLossPolicyTextBlock" xlink:to="ter_ComprehensiveIncomeLossPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US" id="id_758292_500373_1_1">Comprehensive Income Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US" id="id_758292_500373_2_1">Comprehensive income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US" id="id_758292_500373_6_1">Comprehensive income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xml:lang="en-US" id="id_758292_506810_1_1">Comprehensive Income Note [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xml:lang="en-US" id="id_758292_506810_2_1">ACCUMULATED OTHER COMPREHENSIVE INCOME</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:to="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConsecutiveTradingDays" xlink:label="ter_ConsecutiveTradingDays"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConsecutiveTradingDays_lbl" xml:lang="en-US" id="id_758292_594682_3_1">Consecutive trading days.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConsecutiveTradingDays_lbl" xml:lang="en-US" id="id_758292_594682_1_1">Consecutive Trading Days</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConsecutiveTradingDays_lbl" xml:lang="en-US" id="id_758292_594682_2_1">Consecutive trading days</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConsecutiveTradingDays" xlink:to="ter_ConsecutiveTradingDays_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="us-gaap_ConstructionInProgressGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xml:lang="en-US" id="id_758292_502067_1_1">Construction In Progress Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xml:lang="en-US" id="id_758292_502067_2_1">Construction in progress</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionInProgressGross" xlink:to="us-gaap_ConstructionInProgressGross_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ContractualInterestExpenseOnCoupon" xlink:label="ter_ContractualInterestExpenseOnCoupon"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ContractualInterestExpenseOnCoupon_lbl" xml:lang="en-US" id="id_758292_594526_3_1">Contractual interest expense on the coupon.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ContractualInterestExpenseOnCoupon_lbl" xml:lang="en-US" id="id_758292_594526_1_1">Contractual Interest Expense On Coupon</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ContractualInterestExpenseOnCoupon_lbl" xml:lang="en-US" id="id_758292_594526_2_1">Contractual interest expense on the coupon</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ContractualInterestExpenseOnCoupon" xlink:to="ter_ContractualInterestExpenseOnCoupon_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConversionOfCommonStockForTradingDays" xlink:label="ter_ConversionOfCommonStockForTradingDays"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConversionOfCommonStockForTradingDays_lbl" xml:lang="en-US" id="id_758292_594948_3_1">Conversion of common stock for trading days.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConversionOfCommonStockForTradingDays_lbl" xml:lang="en-US" id="id_758292_594948_1_1">Conversion Of Common Stock For Trading Days</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConversionOfCommonStockForTradingDays_lbl" xml:lang="en-US" id="id_758292_594948_2_1">Conversion of common stock for trading days, number of days</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConversionOfCommonStockForTradingDays" xlink:to="ter_ConversionOfCommonStockForTradingDays_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConversionValueOfNotes" xlink:label="ter_ConversionValueOfNotes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConversionValueOfNotes_lbl" xml:lang="en-US" id="id_758292_594949_3_1">Conversion value of notes.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConversionValueOfNotes_lbl" xml:lang="en-US" id="id_758292_594949_1_1">Conversion Value Of Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConversionValueOfNotes_lbl" xml:lang="en-US" id="id_758292_594949_2_1">If-converted value of notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConversionValueOfNotes" xlink:to="ter_ConversionValueOfNotes_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConvertibleCommonStockConversionPeriodBeforeExpiration" xlink:label="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration_lbl" xml:lang="en-US" id="id_758292_594311_3_1">Conversion period of common stock before their expiration date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration_lbl" xml:lang="en-US" id="id_758292_594311_1_1">Convertible Common Stock Conversion Period Before Expiration</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration_lbl" xml:lang="en-US" id="id_758292_594311_2_1">Conversion period before expiration, period, months</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration" xlink:to="ter_ConvertibleCommonStockConversionPeriodBeforeExpiration_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConvertibleDebt" xlink:label="us-gaap_ConvertibleDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleDebt_lbl" xml:lang="en-US" id="id_758292_509400_1_1">Convertible Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConvertibleDebt_lbl" xml:lang="en-US" id="id_758292_509400_2_1">Convertible debt, Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ConvertibleDebt_lbl" xml:lang="en-US" id="id_758292_509400_6_1">Net carrying amount of the convertible debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleDebt" xlink:to="us-gaap_ConvertibleDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConvertibleDebtFairValueDisclosures" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_lbl" xml:lang="en-US" id="id_758292_511794_1_1">Convertible Debt Fair Value Disclosures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_lbl" xml:lang="en-US" id="id_758292_511794_2_1">Convertible debt, Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleDebtFairValueDisclosures" xlink:to="us-gaap_ConvertibleDebtFairValueDisclosures_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConvertibleNoteHedges" xlink:label="ter_ConvertibleNoteHedges"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594767_3_1">Convertible note hedges.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594767_1_1">Convertible Note Hedges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConvertibleNoteHedges_lbl" xml:lang="en-US" id="id_758292_594767_2_1">Convertible note hedges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConvertibleNoteHedges" xlink:to="ter_ConvertibleNoteHedges_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConvertibleNoteMember" xlink:label="ter_ConvertibleNoteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConvertibleNoteMember_lbl" xml:lang="en-US" id="id_758292_594605_3_1">Convertible Note [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConvertibleNoteMember_lbl" xml:lang="en-US" id="id_758292_594605_1_1">Convertible Note [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConvertibleNoteMember_lbl" xml:lang="en-US" id="id_758292_594605_2_1">Convertible Notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConvertibleNoteMember" xlink:to="ter_ConvertibleNoteMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConvertibleNotesHedgeAndWarrantMember" xlink:label="ter_ConvertibleNotesHedgeAndWarrantMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConvertibleNotesHedgeAndWarrantMember_lbl" xml:lang="en-US" id="id_758292_594731_3_1">Convertible Notes Hedge And Warrant [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConvertibleNotesHedgeAndWarrantMember_lbl" xml:lang="en-US" id="id_758292_594731_1_1">Convertible Notes Hedge And Warrant [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConvertibleNotesHedgeAndWarrantMember_lbl" xml:lang="en-US" id="id_758292_594731_2_1">Convertible Notes Hedge Warrant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConvertibleNotesHedgeAndWarrantMember" xlink:to="ter_ConvertibleNotesHedgeAndWarrantMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ConvertibleSeniorNotesMember" xlink:label="ter_ConvertibleSeniorNotesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ConvertibleSeniorNotesMember_lbl" xml:lang="en-US" id="id_758292_594766_3_1">Convertible Senior Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ConvertibleSeniorNotesMember_lbl" xml:lang="en-US" id="id_758292_594766_1_1">Convertible Senior Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ConvertibleSeniorNotesMember_lbl" xml:lang="en-US" id="id_758292_594766_2_1">Convertible Senior Notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ConvertibleSeniorNotesMember" xlink:to="ter_ConvertibleSeniorNotesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CorporateAndEliminationsMember" xlink:label="ter_CorporateAndEliminationsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CorporateAndEliminationsMember_lbl" xml:lang="en-US" id="id_758292_531826_3_1">Corporate And Eliminations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CorporateAndEliminationsMember_lbl" xml:lang="en-US" id="id_758292_531826_1_1">Corporate And Eliminations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CorporateAndEliminationsMember_lbl" xml:lang="en-US" id="id_758292_531826_2_1">Corporate And Eliminations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CorporateAndEliminationsMember" xlink:to="ter_CorporateAndEliminationsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="us-gaap_CorporateDebtSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CorporateDebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_504111_1_1">Corporate Debt Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CorporateDebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_504111_2_1">Corporate Debt Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CorporateDebtSecuritiesMember" xlink:to="us-gaap_CorporateDebtSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostMethodInvestmentsPolicy" xlink:label="us-gaap_CostMethodInvestmentsPolicy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostMethodInvestmentsPolicy_lbl" xml:lang="en-US" id="id_758292_509233_1_1">Cost Method Investments Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostMethodInvestmentsPolicy_lbl" xml:lang="en-US" id="id_758292_509233_2_1">Investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostMethodInvestmentsPolicy" xlink:to="us-gaap_CostMethodInvestmentsPolicy_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="us-gaap_CostOfGoodsSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsSold_lbl" xml:lang="en-US" id="id_758292_511099_1_1">Cost Of Goods Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfGoodsSold_lbl" xml:lang="en-US" id="id_758292_511099_2_1">Cost of products</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsSold" xlink:to="us-gaap_CostOfGoodsSold_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US" id="id_758292_508522_1_1">Cost Of Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US" id="id_758292_508522_2_1">Cost of revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US" id="id_758292_508522_6_1">Total cost of revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US" id="id_758292_508522_12_1">Total cost of revenues</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfRevenueAbstract" xlink:label="us-gaap_CostOfRevenueAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenueAbstract_lbl" xml:lang="en-US" id="id_758292_503977_1_1">Cost Of Revenue [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfRevenueAbstract_lbl" xml:lang="en-US" id="id_758292_503977_2_1">Cost of revenues:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenueAbstract" xlink:to="us-gaap_CostOfRevenueAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CostOfRevenueMember" xlink:label="ter_CostOfRevenueMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CostOfRevenueMember_lbl" xml:lang="en-US" id="id_758292_555087_3_1">Cost Of Revenue [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CostOfRevenueMember_lbl" xml:lang="en-US" id="id_758292_555087_1_1">Cost Of Revenue [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CostOfRevenueMember_lbl" xml:lang="en-US" id="id_758292_555087_2_1">Cost Of Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CostOfRevenueMember" xlink:to="ter_CostOfRevenueMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CostOfRevenuesInventoryStepUp" xlink:label="ter_CostOfRevenuesInventoryStepUp"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CostOfRevenuesInventoryStepUp_lbl" xml:lang="en-US" id="id_758292_594497_3_1">Cost of Revenues-Inventory Step-Up</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CostOfRevenuesInventoryStepUp_lbl" xml:lang="en-US" id="id_758292_594497_1_1">Cost Of Revenues Inventory Step Up</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CostOfRevenuesInventoryStepUp_lbl" xml:lang="en-US" id="id_758292_594497_2_1">Cost of revenues-inventory step-up</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CostOfRevenuesInventoryStepUp" xlink:to="ter_CostOfRevenuesInventoryStepUp_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory" xlink:label="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory_lbl" xml:lang="en-US" id="id_758292_594524_3_1">Cost of revenues-provision for excess and obsolete inventory.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory_lbl" xml:lang="en-US" id="id_758292_594524_1_1">Cost Of Revenues Provision For Excess And Obsolete Inventory</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory_lbl" xml:lang="en-US" id="id_758292_594524_2_1">Cost of revenues-inventory charge</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory" xlink:to="ter_CostOfRevenuesProvisionForExcessAndObsoleteInventory_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfServices" xlink:label="us-gaap_CostOfServices"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfServices_lbl" xml:lang="en-US" id="id_758292_509874_1_1">Cost Of Services</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfServices_lbl" xml:lang="en-US" id="id_758292_509874_2_1">Cost of services</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfServices" xlink:to="us-gaap_CostOfServices_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_503551_1_1">Current Federal Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_503551_2_1">Current, U.S. Federal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_758292_497832_1_1">Current Fiscal Year End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_758292_497832_2_1">Current Fiscal Year End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_511395_1_1">Current Foreign Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_511395_2_1">Current, Non-U.S.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_500498_1_1">Current Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_500498_6_1">Current, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_510341_1_1">Current State And Local Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_510341_2_1">Current, State</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CustomerAdvancesAndDeposits" xlink:label="us-gaap_CustomerAdvancesAndDeposits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CustomerAdvancesAndDeposits_lbl" xml:lang="en-US" id="id_758292_500001_1_1">Customer Advances And Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CustomerAdvancesAndDeposits_lbl" xml:lang="en-US" id="id_758292_500001_2_1">Customer advances</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerAdvancesAndDeposits" xlink:to="us-gaap_CustomerAdvancesAndDeposits_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CustomerBacklogMember" xlink:label="ter_CustomerBacklogMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CustomerBacklogMember_lbl" xml:lang="en-US" id="id_758292_534104_3_1">Customer backlog [member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CustomerBacklogMember_lbl" xml:lang="en-US" id="id_758292_534104_1_1">Customer Backlog [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CustomerBacklogMember_lbl" xml:lang="en-US" id="id_758292_534104_2_1">Customer Backlog</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CustomerBacklogMember" xlink:to="ter_CustomerBacklogMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember" xlink:label="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember_lbl" xml:lang="en-US" id="id_758292_594856_3_1">Customer Relationships and Service and Software Maintenance Contracts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember_lbl" xml:lang="en-US" id="id_758292_594856_1_1">Customer Relationships And Service And Software Maintenance Contracts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember_lbl" xml:lang="en-US" id="id_758292_594856_2_1">Customer Relationships And Service And Software Maintenance Contracts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember" xlink:to="ter_CustomerRelationshipsAndServiceAndSoftwareMaintenanceContractsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="us-gaap_CustomerRelationshipsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xml:lang="en-US" id="id_758292_513385_1_1">Customer Relationships [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xml:lang="en-US" id="id_758292_513385_2_1">Customer Relationships</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtConversionPremiumPercentage" xlink:label="ter_DebtConversionPremiumPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtConversionPremiumPercentage_lbl" xml:lang="en-US" id="id_758292_594698_3_1">Debt conversion premium percentage.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtConversionPremiumPercentage_lbl" xml:lang="en-US" id="id_758292_594698_1_1">Debt Conversion Premium Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtConversionPremiumPercentage_lbl" xml:lang="en-US" id="id_758292_594698_2_1">Debt conversion premium percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtConversionPremiumPercentage" xlink:to="ter_DebtConversionPremiumPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtCurrent" xlink:label="us-gaap_DebtCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtCurrent_lbl" xml:lang="en-US" id="id_758292_508775_1_1">Debt Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtCurrent_lbl" xml:lang="en-US" id="id_758292_508775_2_1">Current debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtCurrent" xlink:to="us-gaap_DebtCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_511836_1_1">Debt Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_511836_2_1">DEBT</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureTextBlock" xlink:to="us-gaap_DebtDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US" id="id_758292_503845_1_1">Debt Instrument [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US" id="id_758292_503845_2_1">Debt Instrument</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US" id="id_758292_499004_1_1">Debt Instrument Carrying Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US" id="id_758292_499004_2_1">Outstanding loan principal amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtInstrumentConversionSharePrice" xlink:label="ter_DebtInstrumentConversionSharePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtInstrumentConversionSharePrice_lbl" xml:lang="en-US" id="id_758292_675951_3_1">Debt Instrument Conversion Share Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtInstrumentConversionSharePrice_lbl" xml:lang="en-US" id="id_758292_675951_1_1">Debt Instrument Conversion Share Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtInstrumentConversionSharePrice_lbl" xml:lang="en-US" id="id_758292_675951_2_1">Debt instrument conversion price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtInstrumentConversionSharePrice" xlink:to="ter_DebtInstrumentConversionSharePrice_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl" xml:lang="en-US" id="id_758292_502993_1_1">Debt Instrument Convertible Carrying Amount Of The Equity Component</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl" xml:lang="en-US" id="id_758292_502993_2_1">Carrying amount of equity component</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xlink:to="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xml:lang="en-US" id="id_758292_503053_1_1">Debt Instrument Convertible Conversion Price 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xml:lang="en-US" id="id_758292_503053_2_1">Initial debt conversion price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleInterestExpense" xlink:label="us-gaap_DebtInstrumentConvertibleInterestExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleInterestExpense_lbl" xml:lang="en-US" id="id_758292_514881_1_1">Debt Instrument Convertible Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DebtInstrumentConvertibleInterestExpense_lbl" xml:lang="en-US" id="id_758292_514881_6_1">Total interest expense on the convertible debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleInterestExpense" xlink:to="us-gaap_DebtInstrumentConvertibleInterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1" xlink:label="us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1_lbl" xml:lang="en-US" id="id_758292_505283_1_1">Debt Instrument Convertible Remaining Discount Amortization Period 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1_lbl" xml:lang="en-US" id="id_758292_505283_2_1">Amortization period of unamortized discount, years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1" xlink:to="us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature" xlink:label="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature_lbl" xml:lang="en-US" id="id_758292_503855_1_1">Debt Instrument Convertible Terms Of Conversion Feature</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature_lbl" xml:lang="en-US" id="id_758292_503855_2_1">Initial conversion rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature" xlink:to="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US" id="id_758292_501055_1_1">Debt Instrument Face Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US" id="id_758292_501055_2_1">Aggregate principal amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US" id="id_758292_501055_12_1">Debt principal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xml:lang="en-US" id="id_758292_502397_1_1">Debt Instrument Interest Rate Effective Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xml:lang="en-US" id="id_758292_502397_2_1">Effective annual interest rate on notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_758292_500674_1_1">Debt Instrument Interest Rate Stated Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_758292_500674_2_1">Debt instrument, interest rate, stated percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xml:lang="en-US" id="id_758292_508163_1_1">Debt Instrument [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xml:lang="en-US" id="id_758292_508163_2_1">Debt Instrument</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_758292_499147_1_1">Debt Instrument Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_758292_499147_2_1">Debt Instrument, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xml:lang="en-US" id="id_758292_507088_1_1">Debt Instrument Periodic Payment Principal</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xml:lang="en-US" id="id_758292_507088_2_1">Semiannual principal payments of loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:to="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtInstrumentSeniorNotesMaturityDate" xlink:label="ter_DebtInstrumentSeniorNotesMaturityDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtInstrumentSeniorNotesMaturityDate_lbl" xml:lang="en-US" id="id_758292_594950_3_1">Debt instrument senior notes maturity date.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtInstrumentSeniorNotesMaturityDate_lbl" xml:lang="en-US" id="id_758292_594950_1_1">Debt Instrument Senior Notes Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtInstrumentSeniorNotesMaturityDate_lbl" xml:lang="en-US" id="id_758292_594950_2_1">Senior notes maturity date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtInstrumentSeniorNotesMaturityDate" xlink:to="ter_DebtInstrumentSeniorNotesMaturityDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US" id="id_758292_498094_1_1">Debt Instrument [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US" id="id_758292_498094_2_1">Schedule of Long-term Debt Instruments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US" id="id_758292_503320_1_1">Debt Instrument Unamortized Discount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US" id="id_758292_503320_2_1">Unamortized discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtInstrumentWarrantTransactionReceived" xlink:label="ter_DebtInstrumentWarrantTransactionReceived"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtInstrumentWarrantTransactionReceived_lbl" xml:lang="en-US" id="id_758292_595020_3_1">Debt Instrument Warrant Transaction Received.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtInstrumentWarrantTransactionReceived_lbl" xml:lang="en-US" id="id_758292_595020_1_1">Debt Instrument Warrant Transaction Received</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtInstrumentWarrantTransactionReceived_lbl" xml:lang="en-US" id="id_758292_595020_2_1">Financing transaction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtInstrumentWarrantTransactionReceived" xlink:to="ter_DebtInstrumentWarrantTransactionReceived_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtLineItems" xlink:label="ter_DebtLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtLineItems_lbl" xml:lang="en-US" id="id_758292_581207_3_1">Debt [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtLineItems_lbl" xml:lang="en-US" id="id_758292_581207_1_1">Debt [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtLineItems_lbl" xml:lang="en-US" id="id_758292_581207_2_1">Debt [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtLineItems" xlink:to="ter_DebtLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtSecuritiesMember" xlink:label="us-gaap_DebtSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_508499_1_1">Debt Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_508499_2_1">Debt Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesMember" xlink:to="us-gaap_DebtSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DebtTable" xlink:label="ter_DebtTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DebtTable_lbl" xml:lang="en-US" id="id_758292_588914_3_1">Debt [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DebtTable_lbl" xml:lang="en-US" id="id_758292_588914_1_1">Debt [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DebtTable_lbl" xml:lang="en-US" id="id_758292_588914_2_1">Debt [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DebtTable" xlink:to="ter_DebtTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis_lbl" xml:lang="en-US" id="id_758292_504051_1_1">Deferred Compensation Arrangement With Individual Share Based Payments By Title Of Individual [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis_lbl" xml:lang="en-US" id="id_758292_504051_2_1">Title of Individual [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTitleOfIndividualAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_502225_1_1">Deferred Federal Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_502225_2_1">Deferred, U.S. Federal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_512745_1_1">Deferred Foreign Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_512745_2_1">Deferred, Non-U.S.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredForeignIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_512538_1_1">Deferred Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_758292_512538_2_1">Deferred taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:label="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments_lbl" xml:lang="en-US" id="id_758292_594860_3_1">Deferred income tax expense benefit net of adjustments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments_lbl" xml:lang="en-US" id="id_758292_594860_1_1">Deferred Income Tax Expense Benefit Net Of Adjustments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments_lbl" xml:lang="en-US" id="id_758292_594860_6_1">Deferred, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:to="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredRevenueAndCustomerAdvancesAcceptance" xlink:label="ter_DeferredRevenueAndCustomerAdvancesAcceptance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DeferredRevenueAndCustomerAdvancesAcceptance_lbl" xml:lang="en-US" id="id_758292_594647_3_1">Deferred revenue and customer advances acceptance.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DeferredRevenueAndCustomerAdvancesAcceptance_lbl" xml:lang="en-US" id="id_758292_594647_1_1">Deferred Revenue And Customer Advances Acceptance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DeferredRevenueAndCustomerAdvancesAcceptance_lbl" xml:lang="en-US" id="id_758292_594647_2_1">Acceptance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DeferredRevenueAndCustomerAdvancesAcceptance" xlink:to="ter_DeferredRevenueAndCustomerAdvancesAcceptance_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredRevenueAndCustomerAdvancesCurrent" xlink:label="ter_DeferredRevenueAndCustomerAdvancesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DeferredRevenueAndCustomerAdvancesCurrent_lbl" xml:lang="en-US" id="id_758292_522126_3_1">The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. Also includes customer advance payments represent a part or a full amount of a contractually due sum that is paid in advance of the delivery of goods or services.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DeferredRevenueAndCustomerAdvancesCurrent_lbl" xml:lang="en-US" id="id_758292_522126_1_1">Deferred Revenue And Customer Advances Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DeferredRevenueAndCustomerAdvancesCurrent_lbl" xml:lang="en-US" id="id_758292_522126_2_1">Deferred revenue and customer advances</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xml:lang="en-US" id="id_758292_508810_2_1">Discount rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xml:lang="en-US" id="id_758292_508810_12_1">Discount rate utilized to determine future pension obligations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInitialMedicalTrend_lbl" xml:lang="en-US" id="id_758292_594609_1_1">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Initial Medical Trend</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationMedicalCostTrendRateDecreaseToUltimateRateInYear_lbl" xml:lang="en-US" id="id_758292_594889_1_1">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Medical Cost Trend Rate Decrease To Ultimate Rate In Year</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationSalaryProgressionRate_lbl" xml:lang="en-US" id="id_758292_595045_3_1">Defined benefit plan assumptions used calculating benefit obligation salary progression rate.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationSalaryProgressionRate_lbl" xml:lang="en-US" id="id_758292_595045_1_1">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Salary Progression Rate</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_lbl" xml:lang="en-US" id="id_758292_512263_2_1">Effect of one percentage point increase on postretirement benefit obligations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_lbl" xml:lang="en-US" id="id_758292_505389_1_1">Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_lbl" xml:lang="en-US" id="id_758292_505389_2_1">Effect of one percentage point increase on total service and interest cost components</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_lbl" xml:lang="en-US" id="id_758292_506116_1_1">Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_lbl" xml:lang="en-US" id="id_758292_506116_2_1">2018-2022</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_lbl" xml:lang="en-US" id="id_758292_501201_1_1">Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_lbl" xml:lang="en-US" id="id_758292_501201_2_1">2013</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_lbl" xml:lang="en-US" id="id_758292_514098_1_1">Defined Benefit Plan Expected Future Benefit Payments Year Four</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_lbl" xml:lang="en-US" id="id_758292_505459_1_1">Defined Benefit Plan Expected Future Benefit Payments Year Three</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DisclosureAcquisitionsAdditionalInformationAbstract_lbl" xml:lang="en-US" id="id_758292_615625_1_1">Disclosure Acquisitions Additional Information [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DisclosureStockBasedCompensationAdditionalInformationAbstract_lbl" xml:lang="en-US" id="id_758292_619877_3_1">Disclosure Stock Based Compensation Additional Information [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DisclosureStockRepurchaseProgramAdditionalInformationAbstract_lbl" xml:lang="en-US" id="id_758292_615868_3_1">Disclosure Stock Repurchase Program Additional Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DisclosureStockRepurchaseProgramAdditionalInformationAbstract_lbl" xml:lang="en-US" id="id_758292_615868_1_1">Disclosure Stock Repurchase Program Additional Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DisclosureStockRepurchaseProgramAdditionalInformationAbstract_lbl" xml:lang="en-US" id="id_758292_615868_2_1">Disclosure Stock Repurchase Program Additional Information [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DisclosureSummaryOfOperatingLossCarryforwardsAbstract_lbl" xml:lang="en-US" id="id_758292_691779_3_1">Disclosure - Summary Of Operating Loss Carryforwards [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DisclosureSummaryOfOperatingLossCarryforwardsAbstract_lbl" xml:lang="en-US" id="id_758292_691779_2_1">Disclosure - Summary Of Operating Loss Carryforwards [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DisclosureUsefulLivesOfAssetsAbstract_lbl" xml:lang="en-US" id="id_758292_691780_2_1">Disclosure - Useful Lives of Assets [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DisclosureValuationAndQualifyingAccountsAbstract" xlink:label="ter_DisclosureValuationAndQualifyingAccountsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DisclosureValuationAndQualifyingAccountsAbstract_lbl" xml:lang="en-US" id="id_758292_649836_3_1">Disclosure Valuation And Qualifying Accounts [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DisclosureValuationAndQualifyingAccountsAbstract_lbl" xml:lang="en-US" id="id_758292_649836_1_1">Disclosure Valuation And Qualifying Accounts [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DisclosureValuationAndQualifyingAccountsAbstract_lbl" xml:lang="en-US" id="id_758292_649836_2_1">Disclosure Valuation And Qualifying Accounts [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_lbl" xml:lang="en-US" id="id_758292_503324_2_1">Gain from disposal of discontinued operation before income taxes</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveVerboseLabel" xlink:label="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_lbl" xml:lang="en-US" id="id_758292_505772_34_1">Less: Gain on disposal of discontinued operations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_lbl" xml:lang="en-US" id="id_758292_500251_32_1">Income from discontinued operations before income taxes</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DueAfterFiveYearsThroughTenYearsMember_lbl" xml:lang="en-US" id="id_758292_531961_1_1">Due After Five Years Through Ten Years [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DueAfterFiveYearsThroughTenYearsMember_lbl" xml:lang="en-US" id="id_758292_531961_2_1">Due After Five Years Through Ten Years</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DueAfterOneYearThroughFiveYearsMember_lbl" xml:lang="en-US" id="id_758292_531960_3_1">Due After One Year Through Five Years [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DueAfterOneYearThroughFiveYearsMember_lbl" xml:lang="en-US" id="id_758292_531960_1_1">Due After One Year Through Five Years [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DueAfterOneYearThroughFiveYearsMember_lbl" xml:lang="en-US" id="id_758292_531960_2_1">Due After One Year Through Five Years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_DueAfterOneYearThroughFiveYearsMember" xlink:to="ter_DueAfterOneYearThroughFiveYearsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DueAfterTenYearsMember" xlink:label="ter_DueAfterTenYearsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_DueAfterTenYearsMember_lbl" xml:lang="en-US" id="id_758292_531962_3_1">Due After Ten Years [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DueAfterTenYearsMember_lbl" xml:lang="en-US" id="id_758292_531962_1_1">Due After Ten Years [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DueAfterTenYearsMember_lbl" xml:lang="en-US" id="id_758292_531962_2_1">Due After Ten Years</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_DueInOneYearOrLessMember_lbl" xml:lang="en-US" id="id_758292_531959_1_1">Due In One Year Or Less [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_DueInOneYearOrLessMember_lbl" xml:lang="en-US" id="id_758292_531959_2_1">Due In One Year Or Less</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US" id="id_758292_510187_1_1">Earnings Per Share [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US" id="id_758292_510187_2_1">Net income per common share:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US" id="id_758292_507817_1_1">Earnings Per Share Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US" id="id_758292_507817_32_1">Net income per common share, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US" id="id_758292_507817_2_1">Basic</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US" id="id_758292_501536_1_1">Earnings Per Share Diluted</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US" id="id_758292_501536_2_1">Diluted</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_EarningsPerShareDilutedBeforeAccountingCharges_lbl" xml:lang="en-US" id="id_758292_594715_3_1">Earnings per share diluted before accounting charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_EarningsPerShareDilutedBeforeAccountingCharges_lbl" xml:lang="en-US" id="id_758292_594715_1_1">Earnings Per Share Diluted Before Accounting Charges</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_513994_1_1">Earnings Per Share Policy [Text Block]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="us-gaap_EarningsPerShareTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US" id="id_758292_501344_1_1">Earnings Per Share [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US" id="id_758292_501344_2_1">NET INCOME PER COMMON SHARE</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_lbl" xml:lang="en-US" id="id_758292_509359_2_1">Foreign taxes</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xml:lang="en-US" id="id_758292_502045_1_1">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xml:lang="en-US" id="id_758292_512888_1_1">Employee Severance [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeSeveranceMember" xlink:to="us-gaap_EmployeeSeveranceMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_EmployeesMember" xlink:label="ter_EmployeesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_EmployeesMember_lbl" xml:lang="en-US" id="id_758292_559982_3_1">Employees of the entity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_EmployeesMember_lbl" xml:lang="en-US" id="id_758292_559982_1_1">Employees [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_EmployeesMember_lbl" xml:lang="en-US" id="id_758292_559982_2_1">Employees</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_EmployeeStockPurchasePlanMember_lbl" xml:lang="en-US" id="id_758292_531054_1_1">Employee Stock Purchase Plan [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_EngineeringAndDevelopmentMember_lbl" xml:lang="en-US" id="id_758292_595048_1_1">Engineering And Development [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_EngineeringAndDevelopmentMember_lbl" xml:lang="en-US" id="id_758292_595048_2_1">Engineering And Development</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer"/>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_EquityAndDebtMutualFundsMember" xlink:label="ter_EquityAndDebtMutualFundsMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_EuroMember_lbl" xml:lang="en-US" id="id_758292_555092_3_1">Euro [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_EuropeMember_lbl" xml:lang="en-US" id="id_758292_530825_3_1">Europe [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xml:lang="en-US" id="id_758292_498900_2_1">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US" id="id_758292_499020_1_1">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US" id="id_758292_499020_2_1">Fair Value Measurements, Recurring and Nonrecurring</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ForeignPlanMember_lbl" xml:lang="en-US" id="id_758292_594644_3_1">Foreign Plan [Member]</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_FourPointFiveZeroPercentageConvertibleSeniorNotesMember" xlink:label="ter_FourPointFiveZeroPercentageConvertibleSeniorNotesMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xml:lang="en-US" id="id_758292_500372_2_1">Furniture and Fixtures</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GeneralBusinessMember" xlink:label="us-gaap_GeneralBusinessMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralBusinessMember_lbl" xml:lang="en-US" id="id_758292_514952_1_1">General Business [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GeneralBusinessMember_lbl" xml:lang="en-US" id="id_758292_514952_2_1">General Business Tax Credit Carryforward</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_GenradIncMember" xlink:label="ter_GenradIncMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_GenradIncMember_lbl" xml:lang="en-US" id="id_758292_594739_3_1">Genrad, inc.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_GenradIncMember_lbl" xml:lang="en-US" id="id_758292_594739_1_1">Genrad Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_GenradIncMember_lbl" xml:lang="en-US" id="id_758292_594739_2_1">GenRad, Inc.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_758292_498098_2_1">Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_758292_498098_6_1">Goodwill</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518746_3_1">Goodwill and Intangible Assets Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518746_1_1">Goodwill And Intangible Assets Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl" xml:lang="en-US" id="id_758292_518746_2_1">Goodwill and Intangible Assets Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_GoodwillAndIntangibleAssetsDisclosureLineItems" xlink:to="ter_GoodwillAndIntangibleAssetsDisclosureLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541755_3_1">Goodwill and Intangible Assets Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541755_1_1">Goodwill And Intangible Assets Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xml:lang="en-US" id="id_758292_541755_2_1">Goodwill and Intangible Assets Disclosure [Table]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_GoodwillIntangibleAndLongLivedAssetsPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594772_3_1">Goodwill, Intangible And Long-Lived Assets [Policy Text Block]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="us-gaap_GoodwillPurchaseAccountingAdjustments"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GoodwillPurchaseAccountingAdjustments_lbl" xml:lang="en-US" id="id_758292_499983_2_1">Activity during the year</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent" xlink:label="us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US" id="id_758292_503089_1_1">Increase Decrease In Operating Capital [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US" id="id_758292_506176_1_1">Increase Decrease In Other Operating Assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" xlink:label="us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
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    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xml:lang="en-US" id="id_758292_506727_8_1">Other assets</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IncreaseDecreaseInUnrecognizedTaxBenefit" xlink:label="ter_IncreaseDecreaseInUnrecognizedTaxBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_IncreaseDecreaseInUnrecognizedTaxBenefit_lbl" xml:lang="en-US" id="id_758292_524921_3_1">Increase (Decrease) In Unrecognized Tax Benefit</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xml:lang="en-US" id="id_758292_507277_1_1">Incremental Common Shares Attributable To Call Options And Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xml:lang="en-US" id="id_758292_507277_2_1">Convertible note hedge warrant shares</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xml:lang="en-US" id="id_758292_501045_1_1">Incremental Common Shares Attributable To Conversion Of Debt Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xml:lang="en-US" id="id_758292_501045_2_1">Incremental shares from assumed conversion of convertible notes</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits_lbl" xml:lang="en-US" id="id_758292_595028_3_1">Incremental common shares attributable to conversion of restricted stock units.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits_lbl" xml:lang="en-US" id="id_758292_595028_1_1">Incremental Common Shares Attributable To Conversion Of Restricted Stock Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits_lbl" xml:lang="en-US" id="id_758292_595028_2_1">Restricted stock units</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfStockOption_lbl" xml:lang="en-US" id="id_758292_594773_3_1">Incremental common shares attributable to conversion of stock option.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfStockOption_lbl" xml:lang="en-US" id="id_758292_594773_1_1">Incremental Common Shares Attributable To Conversion Of Stock Option</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfStockOption_lbl" xml:lang="en-US" id="id_758292_594773_2_1">Stock options</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements" xlink:label="us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements_lbl" xml:lang="en-US" id="id_758292_511124_1_1">Incremental Common Shares Attributable To Equity Unit Purchase Agreements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements_lbl" xml:lang="en-US" id="id_758292_511124_2_1">Employee stock purchase rights</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis_lbl" xml:lang="en-US" id="id_758292_506195_1_1">Intercompany Foreign Currency Balance By Description [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis_lbl" xml:lang="en-US" id="id_758292_506195_2_1">Intercompany Foreign Currency Balance by Description [Axis]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntercompanyForeignCurrencyBalanceLineItems_lbl" xml:lang="en-US" id="id_758292_501439_1_1">Intercompany Foreign Currency Balance [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IntercompanyForeignCurrencyBalanceLineItems_lbl" xml:lang="en-US" id="id_758292_501439_2_1">Intercompany Foreign Currency Balance [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntercompanyForeignCurrencyBalanceLineItems" xlink:to="us-gaap_IntercompanyForeignCurrencyBalanceLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntercompanyForeignCurrencyBalanceNameDomain_lbl" xml:lang="en-US" id="id_758292_502212_1_1">Intercompany Foreign Currency Balance Name [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_758292_514855_1_1">Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_758292_514855_8_1">Interest expense and other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaid" xlink:label="us-gaap_InterestPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US" id="id_758292_512118_1_1">Interest Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US" id="id_758292_512118_2_1">Interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaid" xlink:to="us-gaap_InterestPaid_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_InternationalEquityMember" xlink:label="ter_InternationalEquityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_InternationalEquityMember_lbl" xml:lang="en-US" id="id_758292_559059_3_1">International Equity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_InternationalEquityMember_lbl" xml:lang="en-US" id="id_758292_559059_1_1">International Equity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_InternationalEquityMember_lbl" xml:lang="en-US" id="id_758292_559059_2_1">International Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_InternationalEquityMember" xlink:to="ter_InternationalEquityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_InternationalPensionPlansMember" xlink:label="ter_InternationalPensionPlansMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_InternationalPensionPlansMember_lbl" xml:lang="en-US" id="id_758292_577384_3_1">International Pension plans [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_InternationalPensionPlansMember_lbl" xml:lang="en-US" id="id_758292_577384_1_1">International Pension Plans [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_InternationalPensionPlansMember_lbl" xml:lang="en-US" id="id_758292_577384_2_1">International Pension Plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_InternationalPensionPlansMember" xlink:to="ter_InternationalPensionPlansMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xml:lang="en-US" id="id_758292_513241_1_1">Inventory Finished Goods</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xml:lang="en-US" id="id_758292_513241_2_1">Finished goods</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoods" xlink:to="us-gaap_InventoryFinishedGoods_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_758292_508278_1_1">Inventory Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_758292_508278_6_1">Inventory, Net, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="us-gaap_InventoryNetAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNetAbstract_lbl" xml:lang="en-US" id="id_758292_506404_1_1">Inventory Net [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryNetAbstract_lbl" xml:lang="en-US" id="id_758292_506404_2_1">Inventories:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNetAbstract" xlink:to="us-gaap_InventoryNetAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="us-gaap_InventoryPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_499549_1_1">Inventory Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_499549_2_1">Inventories</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryPolicyTextBlock" xlink:to="us-gaap_InventoryPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="us-gaap_InventoryRawMaterials"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryRawMaterials_lbl" xml:lang="en-US" id="id_758292_511310_1_1">Inventory Raw Materials</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryRawMaterials_lbl" xml:lang="en-US" id="id_758292_511310_2_1">Parts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterials" xlink:to="us-gaap_InventoryRawMaterials_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryValuationReserveMember" xlink:label="us-gaap_InventoryValuationReserveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryValuationReserveMember_lbl" xml:lang="en-US" id="id_758292_511807_1_1">Inventory Valuation Reserve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryValuationReserveMember_lbl" xml:lang="en-US" id="id_758292_511807_2_1">Inventory Valuation Reserve</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryValuationReserveMember" xlink:to="us-gaap_InventoryValuationReserveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="us-gaap_InventoryWorkInProcess"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xml:lang="en-US" id="id_758292_504977_1_1">Inventory Work In Process</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xml:lang="en-US" id="id_758292_504977_2_1">Assemblies in process</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcess" xlink:to="us-gaap_InventoryWorkInProcess_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="us-gaap_InventoryWriteDown"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWriteDown_lbl" xml:lang="en-US" id="id_758292_506347_1_1">Inventory Write Down</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryWriteDown_lbl" xml:lang="en-US" id="id_758292_506347_2_1">Provision for excess and obsolete inventory</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWriteDown" xlink:to="us-gaap_InventoryWriteDown_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd#invest_InvestmentAxis" xlink:label="invest_InvestmentAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentAxis_lbl" xml:lang="en-US" id="id_758292_497915_1_1">Investment [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentAxis_lbl" xml:lang="en-US" id="id_758292_497915_2_1">Investment [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentAxis" xlink:to="invest_InvestmentAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd#invest_InvestmentDomain" xlink:label="invest_InvestmentDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentDomain_lbl" xml:lang="en-US" id="id_758292_497903_1_1">Investment [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentDomain_lbl" xml:lang="en-US" id="id_758292_497903_2_1">Investment [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentDomain" xlink:to="invest_InvestmentDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_758292_504284_1_1">Investment Income Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_758292_504284_2_1">Interest income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd#invest_InvestmentOptionsExercisePrice" xlink:label="invest_InvestmentOptionsExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentOptionsExercisePrice_lbl" xml:lang="en-US" id="id_758292_497864_1_1">Investment Options Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentOptionsExercisePrice_lbl" xml:lang="en-US" id="id_758292_497864_2_1">Exercise price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentOptionsExercisePrice" xlink:to="invest_InvestmentOptionsExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="us-gaap_InvestmentsFairValueDisclosure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_510176_1_1">Investments Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_510176_2_1">Marketable securities, Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsFairValueDisclosure" xlink:to="us-gaap_InvestmentsFairValueDisclosure_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares" xlink:label="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares_lbl" xml:lang="en-US" id="id_758292_611623_3_1">Issuance of ordinary shares upon exercise of employee stock options and restricted stock units, shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares_lbl" xml:lang="en-US" id="id_758292_611623_1_1">Issuance Of Ordinary Shares Upon Exercise Of Employee Stock Options And Restricted Stock Units Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares_lbl" xml:lang="en-US" id="id_758292_611623_2_1">Restricted stock units exercise to purchase shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares" xlink:to="ter_IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_JapaneseYenMember" xlink:label="ter_JapaneseYenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_JapaneseYenMember_lbl" xml:lang="en-US" id="id_758292_555054_3_1">Japanese Yen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_JapaneseYenMember_lbl" xml:lang="en-US" id="id_758292_555054_1_1">Japanese Yen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_JapaneseYenMember_lbl" xml:lang="en-US" id="id_758292_555054_2_1">Japanese Yen</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_JapaneseYenMember" xlink:to="ter_JapaneseYenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_JapanLoanMember" xlink:label="ter_JapanLoanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_JapanLoanMember_lbl" xml:lang="en-US" id="id_758292_594537_3_1">Japan Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_JapanLoanMember_lbl" xml:lang="en-US" id="id_758292_594537_1_1">Japan Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_JapanLoanMember_lbl" xml:lang="en-US" id="id_758292_594537_2_1">Japan Loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_JapanLoanMember" xlink:to="ter_JapanLoanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_JP" xlink:label="country_JP"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_JP_lbl" xml:lang="en-US" id="id_758292_497548_1_1">J P</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_JP_lbl" xml:lang="en-US" id="id_758292_497548_2_1">JAPAN</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_JP" xlink:to="country_JP_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_KR" xlink:label="country_KR"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_KR_lbl" xml:lang="en-US" id="id_758292_497616_1_1">K R</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_KR_lbl" xml:lang="en-US" id="id_758292_497616_2_1">KOREA, REPUBLIC OF</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_KR" xlink:to="country_KR_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Land" xlink:label="us-gaap_Land"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Land_lbl" xml:lang="en-US" id="id_758292_513063_1_1">Land</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Land_lbl" xml:lang="en-US" id="id_758292_513063_2_1">Land</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Land" xlink:to="us-gaap_Land_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LastReportedSalePriceOfDebt" xlink:label="ter_LastReportedSalePriceOfDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LastReportedSalePriceOfDebt_lbl" xml:lang="en-US" id="id_758292_594626_3_1">Last reported sale price of debt.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LastReportedSalePriceOfDebt_lbl" xml:lang="en-US" id="id_758292_594626_1_1">Last Reported Sale Price Of Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LastReportedSalePriceOfDebt_lbl" xml:lang="en-US" id="id_758292_594626_2_1">Last reported sale price per share of debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LastReportedSalePriceOfDebt" xlink:to="ter_LastReportedSalePriceOfDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LeaseExpirationDate1" xlink:label="us-gaap_LeaseExpirationDate1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xml:lang="en-US" id="id_758292_510073_1_1">Lease Expiration Date 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xml:lang="en-US" id="id_758292_510073_2_1">Lease expiration date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseExpirationDate1" xlink:to="us-gaap_LeaseExpirationDate1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="us-gaap_LeaseholdImprovementsGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseholdImprovementsGross_lbl" xml:lang="en-US" id="id_758292_509156_1_1">Leasehold Improvements Gross</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_758292_497730_1_1">Legal Entity [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_758292_497730_2_1">Legal Entity [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_758292_506022_1_1">Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_758292_506022_2_1">Total liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_758292_506022_6_1">Total liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xml:lang="en-US" id="id_758292_501731_1_1">Liabilities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xml:lang="en-US" id="id_758292_501731_2_1">LIABILITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_758292_508780_1_1">Liabilities And Stockholders Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_758292_508780_2_1">Total liabilities and shareholders' equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_758292_508780_6_1">Total liabilities and shareholders' equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_758292_511950_1_1">Liabilities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_758292_511950_6_1">Total current liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_758292_510138_1_1">Liabilities Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_758292_510138_2_1">Current liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="us-gaap_LiabilitiesFairValueDisclosure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_505765_1_1">Liabilities Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_505765_2_1">Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_505765_6_1">Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LitepointCorporationMember" xlink:label="ter_LitepointCorporationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LitepointCorporationMember_lbl" xml:lang="en-US" id="id_758292_594708_3_1">LitePoint Corporation [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LitepointCorporationMember_lbl" xml:lang="en-US" id="id_758292_594708_1_1">Litepoint Corporation [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LitepointCorporationMember_lbl" xml:lang="en-US" id="id_758292_594708_2_1">Litepoint Corporation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LitepointCorporationMember" xlink:to="ter_LitepointCorporationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansPayableFairValueDisclosure" xlink:label="us-gaap_LoansPayableFairValueDisclosure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LoansPayableFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_503386_1_1">Loans Payable Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LoansPayableFairValueDisclosure_lbl" xml:lang="en-US" id="id_758292_503386_2_1">Japan loan, Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansPayableFairValueDisclosure" xlink:to="us-gaap_LoansPayableFairValueDisclosure_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LoansPayableToBank" xlink:label="us-gaap_LoansPayableToBank"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LoansPayableToBank_lbl" xml:lang="en-US" id="id_758292_505735_1_1">Loans Payable To Bank</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LoansPayableToBank_lbl" xml:lang="en-US" id="id_758292_505735_2_1">Borrowings from local bank</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LoansPayableToBank_lbl" xml:lang="en-US" id="id_758292_505735_12_1">Japan loan, Carrying Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansPayableToBank" xlink:to="us-gaap_LoansPayableToBank_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_758292_509175_1_1">Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_758292_509175_2_1">Long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_758292_505003_1_1">Long Term Debt And Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_758292_505003_2_1">Total debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_758292_514137_1_1">Long Term Debt Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_758292_514137_2_1">Current portion of long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US" id="id_758292_502284_1_1">Long Term Debt Maturities Repayments Of Principal In Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US" id="id_758292_502284_2_1">2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US" id="id_758292_512846_1_1">Long Term Debt Maturities Repayments Of Principal In Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US" id="id_758292_512846_2_1">2015</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix_lbl" xml:lang="en-US" id="id_758292_523126_3_1">Long Term Debt Maturities Repayments Of Principal In Year Six</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix_lbl" xml:lang="en-US" id="id_758292_523126_1_1">Long Term Debt Maturities Repayments Of Principal In Year Six</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix_lbl" xml:lang="en-US" id="id_758292_523126_2_1">2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter_lbl" xml:lang="en-US" id="id_758292_523444_3_1">Long Term Debt, Maturities, Repayments of Principal in Year Six and Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter_lbl" xml:lang="en-US" id="id_758292_523444_1_1">Long Term Debt Maturities Repayments Of Principal In Year Six And Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter_lbl" xml:lang="en-US" id="id_758292_523444_2_1">Beyond 2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US" id="id_758292_500380_1_1">Long Term Debt Maturities Repayments Of Principal In Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US" id="id_758292_500380_2_1">2014</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US" id="id_758292_510561_1_1">Long Term Debt Maturities Repayments Of Principal In Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US" id="id_758292_510561_2_1">2013</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_758292_518919_3_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_758292_518919_1_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_758292_518919_2_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_758292_541714_3_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_758292_541714_1_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_758292_541714_2_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US" id="id_758292_527496_3_1">Long term debt maturities repayments of principal total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US" id="id_758292_527496_1_1">Long Term Debt Maturities Repayments Of Principal Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US" id="id_758292_527496_6_1">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMember" xlink:label="us-gaap_LongTermDebtMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMember_lbl" xml:lang="en-US" id="id_758292_506189_1_1">Long Term Debt [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMember_lbl" xml:lang="en-US" id="id_758292_506189_2_1">Long-term Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMember" xlink:to="us-gaap_LongTermDebtMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_758292_514586_1_1">Long Term Debt Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_758292_514586_2_1">Long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermMarketableSecuritiesMember" xlink:label="ter_LongTermMarketableSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_LongTermMarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530771_3_1">Long-term Marketable Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_LongTermMarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530771_1_1">Long Term Marketable Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_LongTermMarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530771_2_1">Long-term marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_LongTermMarketableSecuritiesMember" xlink:to="ter_LongTermMarketableSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTimePeriod" xlink:label="us-gaap_LongTermPurchaseCommitmentTimePeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermPurchaseCommitmentTimePeriod_lbl" xml:lang="en-US" id="id_758292_513396_1_1">Long Term Purchase Commitment Time Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermPurchaseCommitmentTimePeriod_lbl" xml:lang="en-US" id="id_758292_513396_2_1">Purchase commitments maximum period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentTimePeriod" xlink:to="us-gaap_LongTermPurchaseCommitmentTimePeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="us-gaap_MachineryAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xml:lang="en-US" id="id_758292_501796_1_1">Machinery And Equipment Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xml:lang="en-US" id="id_758292_501796_2_1">Machinery and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MachineryAndEquipmentGross" xlink:to="us-gaap_MachineryAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="us-gaap_MachineryAndEquipmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xml:lang="en-US" id="id_758292_514171_1_1">Machinery And Equipment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xml:lang="en-US" id="id_758292_514171_2_1">Machinery and Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MachineryAndEquipmentMember" xlink:to="us-gaap_MachineryAndEquipmentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaintenanceTrainingAndExtendedWarranty" xlink:label="ter_MaintenanceTrainingAndExtendedWarranty"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaintenanceTrainingAndExtendedWarranty_lbl" xml:lang="en-US" id="id_758292_594868_3_1">Maintenance, training and extended warranty.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaintenanceTrainingAndExtendedWarranty_lbl" xml:lang="en-US" id="id_758292_594868_1_1">Maintenance Training And Extended Warranty</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaintenanceTrainingAndExtendedWarranty_lbl" xml:lang="en-US" id="id_758292_594868_2_1">Maintenance, training and extended warranty</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaintenanceTrainingAndExtendedWarranty" xlink:to="ter_MaintenanceTrainingAndExtendedWarranty_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="us-gaap_MarketableSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecurities_lbl" xml:lang="en-US" id="id_758292_511911_1_1">Marketable Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecurities_lbl" xml:lang="en-US" id="id_758292_511911_2_1">Marketable securities, Carrying Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecurities" xlink:to="us-gaap_MarketableSecurities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="us-gaap_MarketableSecuritiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesCurrent_lbl" xml:lang="en-US" id="id_758292_505748_1_1">Marketable Securities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesCurrent_lbl" xml:lang="en-US" id="id_758292_505748_2_1">Marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesCurrent" xlink:to="us-gaap_MarketableSecuritiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MarketableSecuritiesMember" xlink:label="ter_MarketableSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530904_3_1">Marketable Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530904_1_1">Marketable Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MarketableSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_530904_2_1">Marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MarketableSecuritiesMember" xlink:to="ter_MarketableSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecuritiesNoncurrent" xlink:label="us-gaap_MarketableSecuritiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_501656_1_1">Marketable Securities Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_501656_2_1">Marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesNoncurrent" xlink:to="us-gaap_MarketableSecuritiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecuritiesRealizedGainLoss" xlink:label="us-gaap_MarketableSecuritiesRealizedGainLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesRealizedGainLoss_lbl" xml:lang="en-US" id="id_758292_509908_1_1">Marketable Securities Realized Gain Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesRealizedGainLoss_lbl" xml:lang="en-US" id="id_758292_509908_2_1">Realized losses on marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesRealizedGainLoss" xlink:to="us-gaap_MarketableSecuritiesRealizedGainLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution" xlink:label="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution_lbl" xml:lang="en-US" id="id_758292_594657_3_1">Maximum employment period considered for vesting of employers' contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution_lbl" xml:lang="en-US" id="id_758292_594657_1_1">Maximum Employment Period Considered For Vesting Of Employers Contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution_lbl" xml:lang="en-US" id="id_758292_594657_2_1">Maximum employment period considered for vesting of employers' contribution, in years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution" xlink:to="ter_MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_758292_514053_1_1">Maximum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_758292_514053_2_1">Maximum</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="us-gaap_MaximumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaximumPercentageOfMatchingContributionsMadeByEmployer" xlink:label="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer_lbl" xml:lang="en-US" id="id_758292_594570_3_1">Maximum percentage of matching contributions made by the employer</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer_lbl" xml:lang="en-US" id="id_758292_594570_1_1">Maximum Percentage Of Matching Contributions Made By Employer</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer_lbl" xml:lang="en-US" id="id_758292_594570_2_1">Maximum percentage of matching contributions made by the employer</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer" xlink:to="ter_MaximumPercentageOfMatchingContributionsMadeByEmployer_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaximumPercentageOfPayrollDeductionUnderEspp" xlink:label="ter_MaximumPercentageOfPayrollDeductionUnderEspp"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaximumPercentageOfPayrollDeductionUnderEspp_lbl" xml:lang="en-US" id="id_758292_564517_3_1">Maximum Percentage Of Payroll Deduction Under Espp</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaximumPercentageOfPayrollDeductionUnderEspp_lbl" xml:lang="en-US" id="id_758292_564517_1_1">Maximum Percentage Of Payroll Deduction Under Espp</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaximumPercentageOfPayrollDeductionUnderEspp_lbl" xml:lang="en-US" id="id_758292_564517_2_1">Regular payroll deductions under ESPP</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaximumPercentageOfPayrollDeductionUnderEspp" xlink:to="ter_MaximumPercentageOfPayrollDeductionUnderEspp_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod" xlink:label="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod_lbl" xml:lang="en-US" id="id_758292_594812_3_1">Maximum price per note for each day of measurement period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod_lbl" xml:lang="en-US" id="id_758292_594812_1_1">Maximum Price Per Note For Each Day Of Measurement Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod_lbl" xml:lang="en-US" id="id_758292_594812_2_1">Maximum price per Note for each day of that measurement period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod" xlink:to="ter_MaximumPricePerNoteForEachDayOfMeasurementPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue" xlink:label="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue_lbl" xml:lang="en-US" id="id_758292_595092_3_1">Maximum Shares Can Be Purchased Under Plan At Fair Market Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue_lbl" xml:lang="en-US" id="id_758292_595092_1_1">Maximum Shares Can Be Purchased Under Plan At Fair Market Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue_lbl" xml:lang="en-US" id="id_758292_595092_2_1">Fair market value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue" xlink:to="ter_MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_758292_513639_1_1">Minimum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_758292_513639_2_1">Minimum</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumMember" xlink:to="us-gaap_MinimumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MortgageLoansOnRealEstate" xlink:label="us-gaap_MortgageLoansOnRealEstate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MortgageLoansOnRealEstate_lbl" xml:lang="en-US" id="id_758292_514757_1_1">Mortgage Loans On Real Estate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MortgageLoansOnRealEstate_lbl" xml:lang="en-US" id="id_758292_514757_2_1">Loan collateralized by real estate mortgage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MortgageLoansOnRealEstate" xlink:to="us-gaap_MortgageLoansOnRealEstate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet" xlink:label="us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet"/>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MsciEafeIndexNetDividendsMember" xlink:label="ter_MsciEafeIndexNetDividendsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_MsciEafeIndexNetDividendsMember_lbl" xml:lang="en-US" id="id_758292_595081_3_1">MSCI EAFE Index (Net Dividends) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_MsciEafeIndexNetDividendsMember_lbl" xml:lang="en-US" id="id_758292_595081_1_1">Msci Eafe Index Net Dividends [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_MsciEafeIndexNetDividendsMember_lbl" xml:lang="en-US" id="id_758292_595081_2_1">MSCI EAFE Index (Net Dividends)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_MsciEafeIndexNetDividendsMember" xlink:to="ter_MsciEafeIndexNetDividendsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_MY" xlink:label="country_MY"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_MY_lbl" xml:lang="en-US" id="id_758292_497480_1_1">M Y</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_MY_lbl" xml:lang="en-US" id="id_758292_497480_2_1">MALAYSIA</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="us-gaap_NatureOfOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NatureOfOperations_lbl" xml:lang="en-US" id="id_758292_507836_1_1">Nature Of Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NatureOfOperations_lbl" xml:lang="en-US" id="id_758292_507836_2_1">THE COMPANY</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="id_758292_508099_1_1">Net Cash Provided By Used In Financing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="id_758292_508099_2_1">Net cash provided by financing activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="id_758292_508099_6_1">Net cash (used for) provided by financing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_503174_1_1">Net Cash Provided By Used In Financing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_503174_2_1">Cash flows from financing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="id_758292_504277_1_1">Net Cash Provided By Used In Investing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="id_758292_504277_2_1">Net cash used for investing activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="id_758292_504277_6_1">Net cash used for investing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_501589_1_1">Net Cash Provided By Used In Investing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_501589_2_1">Cash flows from investing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_758292_512283_1_1">Net Cash Provided By Used In Investing Activities Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_758292_512283_6_1">Net cash used for continuing operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_758292_504077_1_1">Net Cash Provided By Used In Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_758292_504077_2_1">Net cash provided by operating activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_758292_504077_6_1">Net cash provided by operating activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_505595_1_1">Net Cash Provided By Used In Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_758292_505595_2_1">Cash flows from operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_758292_501438_1_1">Net Cash Provided By Used In Operating Activities Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_758292_501438_6_1">Net cash provided by continuing operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NetIncomeBeforeAccountingChanges" xlink:label="ter_NetIncomeBeforeAccountingChanges"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NetIncomeBeforeAccountingChanges_lbl" xml:lang="en-US" id="id_758292_594716_3_1">Net Income Before Accounting Changes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NetIncomeBeforeAccountingChanges_lbl" xml:lang="en-US" id="id_758292_594716_1_1">Net Income Before Accounting Changes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NetIncomeBeforeAccountingChanges_lbl" xml:lang="en-US" id="id_758292_594716_2_1">Net income before accounting changes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NetIncomeBeforeAccountingChanges" xlink:to="ter_NetIncomeBeforeAccountingChanges_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_758292_513055_1_1">Net Income Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_758292_513055_2_1">Net income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_758292_513055_6_1">Net income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAttributableToParentDiluted" xlink:label="us-gaap_NetIncomeLossAttributableToParentDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAttributableToParentDiluted_lbl" xml:lang="en-US" id="id_758292_512759_1_1">Net Income Loss Attributable To Parent Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAttributableToParentDiluted_lbl" xml:lang="en-US" id="id_758292_512759_6_1">Net income for diluted net income per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToParentDiluted" xlink:to="us-gaap_NetIncomeLossAttributableToParentDiluted_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_758292_513871_1_1">Net Income Loss Available To Common Stockholders Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_758292_513871_6_1">Net income or basic net income per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NetIncomeLossPerCommonShareLineItems" xlink:label="ter_NetIncomeLossPerCommonShareLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NetIncomeLossPerCommonShareLineItems_lbl" xml:lang="en-US" id="id_758292_565485_3_1">Net Income (Loss) Per Common Share [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NetIncomeLossPerCommonShareLineItems_lbl" xml:lang="en-US" id="id_758292_565485_1_1">Net Income Loss Per Common Share [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NetIncomeLossPerCommonShareLineItems_lbl" xml:lang="en-US" id="id_758292_565485_2_1">Net Income Loss Per Common Share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NetIncomeLossPerCommonShareLineItems" xlink:to="ter_NetIncomeLossPerCommonShareLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation" xlink:label="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation_lbl" xml:lang="en-US" id="id_758292_594844_3_1">Net operating loss carryforward excess tax deduction related to stock based compensation.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation_lbl" xml:lang="en-US" id="id_758292_594844_1_1">Net Operating Loss Carryforward Excess Tax Deduction Related To Stock Based Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation_lbl" xml:lang="en-US" id="id_758292_594844_2_1">Net operating loss carryforward excess tax deductions related to stock based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation" xlink:to="ter_NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NetPeriodicBenefitCostMember" xlink:label="ter_NetPeriodicBenefitCostMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NetPeriodicBenefitCostMember_lbl" xml:lang="en-US" id="id_758292_536703_3_1">Net Periodic Benefit Cost [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NetPeriodicBenefitCostMember_lbl" xml:lang="en-US" id="id_758292_536703_1_1">Net Periodic Benefit Cost [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NetPeriodicBenefitCostMember_lbl" xml:lang="en-US" id="id_758292_536703_2_1">Net Periodic Benefit Cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NetPeriodicBenefitCostMember" xlink:to="ter_NetPeriodicBenefitCostMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xml:lang="en-US" id="id_758292_508749_1_1">New Accounting Pronouncements Or Change In Accounting Principle [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xml:lang="en-US" id="id_758292_508749_2_1">New Accounting Pronouncements or Change in Accounting Principle</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:to="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NineteenNinetySixEmployeeStockPurchasePlanMember" xlink:label="ter_NineteenNinetySixEmployeeStockPurchasePlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NineteenNinetySixEmployeeStockPurchasePlanMember_lbl" xml:lang="en-US" id="id_758292_594811_3_1">Nineteen Ninety Six Employee Stock Purchase Plan Member</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NineteenNinetySixEmployeeStockPurchasePlanMember_lbl" xml:lang="en-US" id="id_758292_594811_1_1">Nineteen Ninety Six Employee Stock Purchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NineteenNinetySixEmployeeStockPurchasePlanMember_lbl" xml:lang="en-US" id="id_758292_594811_2_1">1996 Employee Stock Purchase Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NineteenNinetySixEmployeeStockPurchasePlanMember" xlink:to="ter_NineteenNinetySixEmployeeStockPurchasePlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="us-gaap_NoncurrentAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncurrentAssets_lbl" xml:lang="en-US" id="id_758292_510605_1_1">Noncurrent Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncurrentAssets_lbl" xml:lang="en-US" id="id_758292_510605_2_1">Long-lived assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncurrentAssets" xlink:to="us-gaap_NoncurrentAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NonUSPensionSettlement" xlink:label="ter_NonUSPensionSettlement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NonUSPensionSettlement_lbl" xml:lang="en-US" id="id_758292_594650_3_1">Non - U.S pension settlement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NonUSPensionSettlement_lbl" xml:lang="en-US" id="id_758292_594650_1_1">Non U S Pension Settlement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NonUSPensionSettlement_lbl" xml:lang="en-US" id="id_758292_594650_2_1">Pension Settlement non US</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NonUSPensionSettlement" xlink:to="ter_NonUSPensionSettlement_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts_lbl" xml:lang="en-US" id="id_758292_508315_1_1">Notional Amount Of Foreign Currency Derivative Purchase Contracts</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts_lbl" xml:lang="en-US" id="id_758292_508315_8_1">Notional amounts, Buy Position</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts" xlink:to="us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotionalAmountOfForeignCurrencyDerivatives" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivatives"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivatives_lbl" xml:lang="en-US" id="id_758292_510208_1_1">Notional Amount Of Foreign Currency Derivatives</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivatives_lbl" xml:lang="en-US" id="id_758292_510208_2_1">Notional amounts, Net Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotionalAmountOfForeignCurrencyDerivatives" xlink:to="us-gaap_NotionalAmountOfForeignCurrencyDerivatives_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts_lbl" xml:lang="en-US" id="id_758292_506887_1_1">Notional Amount Of Foreign Currency Derivative Sale Contracts</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts_lbl" xml:lang="en-US" id="id_758292_506887_2_1">Notional amounts, Sell Position</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts" xlink:to="us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes" xlink:label="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594866_3_1">Number of business days after consecutive trading days for as measurement period for conversion of notes.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594866_1_1">Number Of Business Days After Consecutive Trading Days For As Measurement Period For Conversion Of Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594866_2_1">Number of business days as measurement period for conversion of notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes" xlink:to="ter_NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes" xlink:label="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594568_3_1">Number of consecutive trading days before business days for as measurement period for conversion of notes.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594568_1_1">Number Of Consecutive Trading Days Before Business Days For As Measurement Period For Conversion Of Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes_lbl" xml:lang="en-US" id="id_758292_594568_2_1">Number of trading days as measurement period for conversion of notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes" xlink:to="ter_NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue" xlink:label="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue_lbl" xml:lang="en-US" id="id_758292_660230_3_1">Number Of Customer Accounted For Ten Percent Or Greater Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue_lbl" xml:lang="en-US" id="id_758292_660230_1_1">Number Of Customer Accounted For Ten Percent Or Greater Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue_lbl" xml:lang="en-US" id="id_758292_660230_2_1">Number of customer accounted for more than consolidated revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue" xlink:to="ter_NumberOfCustomerAccountedForTenPercentOrGreaterRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_NumberOfFormerEmployees" xlink:label="ter_NumberOfFormerEmployees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_NumberOfFormerEmployees_lbl" xml:lang="en-US" id="id_758292_582425_3_1">Number Of Former Employees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_NumberOfFormerEmployees_lbl" xml:lang="en-US" id="id_758292_582425_1_1">Number Of Former Employees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_NumberOfFormerEmployees_lbl" xml:lang="en-US" id="id_758292_582425_2_1">Number of former employees elected to receive lump-sum payment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_NumberOfFormerEmployees" xlink:to="ter_NumberOfFormerEmployees_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpenses_lbl" xml:lang="en-US" id="id_758292_509627_1_1">Operating Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingExpenses_lbl" xml:lang="en-US" id="id_758292_509627_2_1">Total operating expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingExpenses_lbl" xml:lang="en-US" id="id_758292_509627_6_1">Total operating expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_OperatingExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="us-gaap_OperatingExpensesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US" id="id_758292_509338_1_1">Operating Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US" id="id_758292_509338_2_1">Operating expenses:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_758292_498863_1_1">Operating Income Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_758292_498863_2_1">Income (loss) from operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_758292_498863_6_1">Income from operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_758292_498863_12_1">Income from operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US" id="id_758292_513818_1_1">Operating Leases Future Minimum Payments Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US" id="id_758292_513818_6_1">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US" id="id_758292_498263_1_1">Operating Leases Future Minimum Payments Due Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US" id="id_758292_498263_2_1">2013</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US" id="id_758292_506888_1_1">Operating Leases Future Minimum Payments Due In Five Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US" id="id_758292_506888_2_1">2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US" id="id_758292_501260_1_1">Operating Leases Future Minimum Payments Due In Four Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US" id="id_758292_501260_2_1">2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US" id="id_758292_504803_1_1">Operating Leases Future Minimum Payments Due In Three Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US" id="id_758292_504803_2_1">2015</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US" id="id_758292_505123_1_1">Operating Leases Future Minimum Payments Due In Two Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US" id="id_758292_505123_2_1">2014</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US" id="id_758292_510891_1_1">Operating Leases Future Minimum Payments Due Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US" id="id_758292_510891_2_1">Beyond 2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="us-gaap_OperatingLeasesRentExpenseNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xml:lang="en-US" id="id_758292_510373_1_1">Operating Leases Rent Expense Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xml:lang="en-US" id="id_758292_510373_2_1">Rental expense under lease commitments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseNet" xlink:to="us-gaap_OperatingLeasesRentExpenseNet_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringBeyondTwoThousandTwentySixMember" xlink:label="ter_OperatingLossCarryforwardsExpiringBeyondTwoThousandTwentySixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringBeyondTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682731_3_1">Operating Loss Carryforwards Expiring Beyond Two Thousand Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringBeyondTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682731_1_1">Operating Loss Carryforwards Expiring Beyond Two Thousand Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringBeyondTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682731_2_1">Beyond 2026</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember_lbl" xml:lang="en-US" id="id_758292_682729_3_1">Operating Loss Carryforwards Expiring Two Thousand Eighteen To Two Thousand Twenty Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember_lbl" xml:lang="en-US" id="id_758292_682729_1_1">Operating Loss Carryforwards Expiring Two Thousand Eighteen To Two Thousand Twenty Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember_lbl" xml:lang="en-US" id="id_758292_682729_2_1">2018-2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandEighteenToTwoThousandTwentyThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_758292_594973_3_1">Operating Loss Carryforwards Expiring Two Thousand Fifteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_758292_594973_1_1">Operating Loss Carryforwards Expiring Two Thousand Fifteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_758292_594973_2_1">2015</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandFifteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_758292_594687_3_1">Operating Loss Carryforwards Expiring Two Thousand Fourteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_758292_594687_1_1">Operating Loss Carryforwards Expiring Two Thousand Fourteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_758292_594687_2_1">2014</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandFourteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember_lbl" xml:lang="en-US" id="id_758292_682728_3_1">Operating Loss Carryforwards Expiring Two Thousand Seventeen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember_lbl" xml:lang="en-US" id="id_758292_682728_1_1">Operating Loss Carryforwards Expiring Two Thousand Seventeen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember_lbl" xml:lang="en-US" id="id_758292_682728_2_1">2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandSeventeenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_758292_595034_3_1">Operating Loss Carryforwards Expiring Two Thousand Sixteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_758292_595034_1_1">Operating Loss Carryforwards Expiring Two Thousand Sixteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_758292_595034_2_1">2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandSixteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember_lbl" xml:lang="en-US" id="id_758292_594653_3_1">Operating Loss Carryforwards Expiring Two Thousand Thirteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember_lbl" xml:lang="en-US" id="id_758292_594653_1_1">Operating Loss Carryforwards Expiring Two Thousand Thirteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember_lbl" xml:lang="en-US" id="id_758292_594653_2_1">2013</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandThirteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682730_3_1">Operating Loss Carryforwards Expiring Two Thousand Twenty Four To Two Thousand Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682730_1_1">Operating Loss Carryforwards Expiring Two Thousand Twenty Four To Two Thousand Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember_lbl" xml:lang="en-US" id="id_758292_682730_2_1">2024-2026</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember" xlink:to="ter_OperatingLossCarryforwardsExpiringTwoThousandTwentyFourToTwoThousandTwentySixMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="us-gaap_OperatingLossCarryforwardsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLossCarryforwardsLineItems_lbl" xml:lang="en-US" id="id_758292_501067_1_1">Operating Loss Carryforwards [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLossCarryforwardsLineItems_lbl" xml:lang="en-US" id="id_758292_501067_2_1">Operating Loss Carryforwards [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsLineItems" xlink:to="us-gaap_OperatingLossCarryforwardsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OperatingLossCarryforwardsNonExpiringMember" xlink:label="ter_OperatingLossCarryforwardsNonExpiringMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OperatingLossCarryforwardsNonExpiringMember_lbl" xml:lang="en-US" id="id_758292_595058_3_1">Operating loss carryforwards non-expiring.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OperatingLossCarryforwardsNonExpiringMember_lbl" xml:lang="en-US" id="id_758292_595058_1_1">Operating Loss Carryforwards Non Expiring [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OperatingLossCarryforwardsNonExpiringMember_lbl" xml:lang="en-US" id="id_758292_595058_2_1">Non-Expiring</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OperatingLossCarryforwardsNonExpiringMember" xlink:to="ter_OperatingLossCarryforwardsNonExpiringMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="us-gaap_OperatingLossCarryforwardsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLossCarryforwardsTable_lbl" xml:lang="en-US" id="id_758292_499608_1_1">Operating Loss Carryforwards [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLossCarryforwardsTable_lbl" xml:lang="en-US" id="id_758292_499608_2_1">Operating Loss Carryforwards [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsTable" xlink:to="us-gaap_OperatingLossCarryforwardsTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="us-gaap_OrderOrProductionBacklogMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrderOrProductionBacklogMember_lbl" xml:lang="en-US" id="id_758292_499297_1_1">Order Or Production Backlog [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OrderOrProductionBacklogMember_lbl" xml:lang="en-US" id="id_758292_499297_2_1">Customer Backlog</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrderOrProductionBacklogMember" xlink:to="us-gaap_OrderOrProductionBacklogMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_OriginallyReportedMember" xlink:label="ter_OriginallyReportedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_OriginallyReportedMember_lbl" xml:lang="en-US" id="id_758292_594957_3_1">Originally Reported [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_OriginallyReportedMember_lbl" xml:lang="en-US" id="id_758292_594957_1_1">Originally Reported [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_OriginallyReportedMember_lbl" xml:lang="en-US" id="id_758292_594957_2_1">Originally Reported</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_OriginallyReportedMember" xlink:to="ter_OriginallyReportedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_758292_502085_1_1">Other Accrued Liabilities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_758292_502085_2_1">Other accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccruedLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_511731_1_1">Other Accrued Liabilities Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_511731_2_1">Long-term other accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US" id="id_758292_500225_1_1">Other Assets Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US" id="id_758292_500225_2_1">Other assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax" xlink:label="us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax_lbl" xml:lang="en-US" id="id_758292_506285_1_1">Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax_lbl" xml:lang="en-US" id="id_758292_506285_2_1">Prior service costs, tax portion</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax" xlink:to="us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xml:lang="en-US" id="id_758292_507182_1_1">Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xml:lang="en-US" id="id_758292_507182_2_1">Unrealized gains on marketable securities:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_lbl" xml:lang="en-US" id="id_758292_510638_1_1">Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_lbl" xml:lang="en-US" id="id_758292_510638_2_1">Prior service cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US" id="id_758292_504304_1_1">Payments Of Debt Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US" id="id_758292_504304_2_1">Debt issuance costs</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_508892_1_1">Payments To Acquire Available For Sale Securities</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_508892_8_1">Purchases of available-for-sale marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:to="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xml:lang="en-US" id="id_758292_499811_1_1">Payments To Acquire Businesses Net Of Cash Acquired</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xml:lang="en-US" id="id_758292_499811_8_1">Acquisition of businesses, net of cash acquired</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_758292_505828_1_1">Payments To Acquire Property Plant And Equipment</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_758292_505828_8_1">Purchases of property, plant and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis_lbl" xml:lang="en-US" id="id_758292_580215_3_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis_lbl" xml:lang="en-US" id="id_758292_580215_1_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis_lbl" xml:lang="en-US" id="id_758292_580215_2_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis" xlink:to="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain_lbl" xml:lang="en-US" id="id_758292_580080_3_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain_lbl" xml:lang="en-US" id="id_758292_580080_1_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain_lbl" xml:lang="en-US" id="id_758292_580080_2_1">Pension And Other Postretirement Benefit Plans Categorized By Geographical [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain" xlink:to="ter_PensionAndOtherPostretirementBenefitPlansCategorizedByGeographicalDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_503970_1_1">Pension And Other Postretirement Benefits Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_503970_2_1">RETIREMENT PLANS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" xlink:label="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_758292_594712_3_1">Pension and other postretirement defined benefit plans accrued employees' compensation and withholdings current and noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_758292_594712_1_1">Pension And Other Postretirement Defined Benefit Plans Accrued Employees Compensation And Withholdings Current And Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_758292_594712_8_1">Accrued employees' compensation and withholdings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" xlink:to="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_758292_514041_1_1">Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_758292_514041_8_1">Retirement plans liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_513102_1_1">Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_758292_513102_2_1">Retirement plans liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:label="us-gaap_PensionAndOtherPostretirementPlansPolicy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementPlansPolicy_lbl" xml:lang="en-US" id="id_758292_512924_1_1">Pension And Other Postretirement Plans Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementPlansPolicy_lbl" xml:lang="en-US" id="id_758292_512924_2_1">Retirement and Postretirement Plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:to="us-gaap_PensionAndOtherPostretirementPlansPolicy_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="us-gaap_PensionPlansDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_758292_502318_1_1">Pension Plans Defined Benefit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_758292_502318_2_1">Defined Benefit Pension Plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionPlansDefinedBenefitMember" xlink:to="us-gaap_PensionPlansDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PensionSettlement" xlink:label="ter_PensionSettlement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PensionSettlement_lbl" xml:lang="en-US" id="id_758292_562299_3_1">Pension Settlement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PensionSettlement_lbl" xml:lang="en-US" id="id_758292_562299_1_1">Pension Settlement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PensionSettlement_lbl" xml:lang="en-US" id="id_758292_562299_2_1">Pension settlement charges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PensionSettlement" xlink:to="ter_PensionSettlement_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate" xlink:label="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate_lbl" xml:lang="en-US" id="id_758292_594850_3_1">Percentage of award vesting on first anniversary of grant date.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate_lbl" xml:lang="en-US" id="id_758292_594850_1_1">Percentage Of Award Vesting On First Anniversary Of Grant Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate_lbl" xml:lang="en-US" id="id_758292_594850_2_1">Award vesting on the first anniversary</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate" xlink:to="ter_PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfCommonStockAcquired" xlink:label="ter_PercentageOfCommonStockAcquired"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfCommonStockAcquired_lbl" xml:lang="en-US" id="id_758292_567312_3_1">Percentage Of Common Stock Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfCommonStockAcquired_lbl" xml:lang="en-US" id="id_758292_567312_1_1">Percentage Of Common Stock Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfCommonStockAcquired_lbl" xml:lang="en-US" id="id_758292_567312_2_1">Common stock purchase percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfCommonStockAcquired" xlink:to="ter_PercentageOfCommonStockAcquired_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfEmployerContributionsVestedPerYear" xlink:label="ter_PercentageOfEmployerContributionsVestedPerYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfEmployerContributionsVestedPerYear_lbl" xml:lang="en-US" id="id_758292_594976_3_1">Percentage of employer contributions vested per year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfEmployerContributionsVestedPerYear_lbl" xml:lang="en-US" id="id_758292_594976_1_1">Percentage Of Employer Contributions Vested Per Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfEmployerContributionsVestedPerYear_lbl" xml:lang="en-US" id="id_758292_594976_2_1">Percentage of employer contributions vested per year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfEmployerContributionsVestedPerYear" xlink:to="ter_PercentageOfEmployerContributionsVestedPerYear_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfEmployerMatchOnEmployeeContribution" xlink:label="ter_PercentageOfEmployerMatchOnEmployeeContribution"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfEmployerMatchOnEmployeeContribution_lbl" xml:lang="en-US" id="id_758292_594747_3_1">Percentage of employer match on employee contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfEmployerMatchOnEmployeeContribution_lbl" xml:lang="en-US" id="id_758292_594747_1_1">Percentage Of Employer Match On Employee Contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfEmployerMatchOnEmployeeContribution_lbl" xml:lang="en-US" id="id_758292_594747_2_1">Percentage of employer match on employee contribution</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfEmployerMatchOnEmployeeContribution" xlink:to="ter_PercentageOfEmployerMatchOnEmployeeContribution_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod" xlink:label="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod_lbl" xml:lang="en-US" id="id_758292_595520_3_1">Percentage Of Purchase Price Of Stock On Lesser Of Fair Market Value During First Day Or Last Day Of Offering Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod_lbl" xml:lang="en-US" id="id_758292_595520_1_1">Percentage Of Purchase Price Of Stock On Lesser Of Fair Market Value During First Day Or Last Day Of Offering Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod_lbl" xml:lang="en-US" id="id_758292_595520_2_1">Percentage of common stock price paid on last business day of the purchase period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod" xlink:to="ter_PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock" xlink:label="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock_lbl" xml:lang="en-US" id="id_758292_595083_3_1">Percentage of warrant price in excess of closing price of common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock_lbl" xml:lang="en-US" id="id_758292_595083_1_1">Percentage Of Warrant Price In Excess Of Closing Price Of Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock_lbl" xml:lang="en-US" id="id_758292_595083_2_1">Percentage of warrant price in excess of closing price of common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock" xlink:to="ter_PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PercentOfIncreaseInConversionPrice" xlink:label="ter_PercentOfIncreaseInConversionPrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PercentOfIncreaseInConversionPrice_lbl" xml:lang="en-US" id="id_758292_595076_3_1">Percent of increase in conversion price.</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_lbl" xml:lang="en-US" id="id_758292_507574_1_1">Portion At Fair Value Fair Value Disclosure [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_lbl" xml:lang="en-US" id="id_758292_507574_2_1">Fair Value</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PostretirementBenefitCostsMember" xlink:label="us-gaap_PostretirementBenefitCostsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PostretirementBenefitCostsMember_lbl" xml:lang="en-US" id="id_758292_504894_1_1">Postretirement Benefit Costs [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PostretirementBenefitCostsMember_lbl" xml:lang="en-US" id="id_758292_504894_2_1">Postretirement Benefit Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PostretirementBenefitCostsMember" xlink:to="us-gaap_PostretirementBenefitCostsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PrepaidAndOtherCurrentAssetsMember" xlink:label="ter_PrepaidAndOtherCurrentAssetsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PrepaidAndOtherCurrentAssetsMember_lbl" xml:lang="en-US" id="id_758292_549431_3_1">Prepaid and Other Current Assets [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PrepaidAndOtherCurrentAssetsMember_lbl" xml:lang="en-US" id="id_758292_549431_1_1">Prepaid And Other Current Assets [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PrepaidAndOtherCurrentAssetsMember_lbl" xml:lang="en-US" id="id_758292_549431_2_1">Prepayments and other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PrepaidAndOtherCurrentAssetsMember" xlink:to="ter_PrepaidAndOtherCurrentAssetsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US" id="id_758292_497998_1_1">Prepaid Expense And Other Assets Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US" id="id_758292_497998_2_1">Prepayments and other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock" xlink:label="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594692_3_1">Preparation Of Financial Statements And Use Of Estimates [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594692_1_1">Preparation Of Financial Statements And Use Of Estimates Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594692_2_1">Preparation of Financial Statements and Use of Estimates</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock" xlink:to="ter_PreparationOfFinancialStatementsAndUseOfEstimatesPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PreTwoThousandTenRestructuringPlanMember" xlink:label="ter_PreTwoThousandTenRestructuringPlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PreTwoThousandTenRestructuringPlanMember_lbl" xml:lang="en-US" id="id_758292_586043_3_1">Pre Two Thousand Ten Restructuring Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PreTwoThousandTenRestructuringPlanMember_lbl" xml:lang="en-US" id="id_758292_586043_1_1">Pre Two Thousand Ten Restructuring Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PreTwoThousandTenRestructuringPlanMember_lbl" xml:lang="en-US" id="id_758292_586043_2_1">Pre-2010 Activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PreTwoThousandTenRestructuringPlanMember" xlink:to="ter_PreTwoThousandTenRestructuringPlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PrincipalAmountPercentage" xlink:label="ter_PrincipalAmountPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PrincipalAmountPercentage_lbl" xml:lang="en-US" id="id_758292_594925_3_1">Principal amount percentage.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PrincipalAmountPercentage_lbl" xml:lang="en-US" id="id_758292_594925_1_1">Principal Amount Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PrincipalAmountPercentage_lbl" xml:lang="en-US" id="id_758292_594925_2_1">Percentage of principal amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PrincipalAmountPercentage" xlink:to="ter_PrincipalAmountPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl" xml:lang="en-US" id="id_758292_513702_1_1">Proceeds From Divestiture Of Businesses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl" xml:lang="en-US" id="id_758292_513702_2_1">Cash received from sale of business</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:to="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xml:lang="en-US" id="id_758292_500789_1_1">Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xml:lang="en-US" id="id_758292_500789_2_1">Issuance of common stock under stock option and stock purchase plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:to="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="us-gaap_ProceedsFromLifeInsurancePolicies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_758292_506062_1_1">Proceeds From Life Insurance Policies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_758292_506062_2_1">Proceeds from life insurance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLifeInsurancePolicies" xlink:to="us-gaap_ProceedsFromLifeInsurancePolicies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_500427_1_1">Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_500427_2_1">Proceeds from maturities of available-for-sale marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:to="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_511764_1_1">Proceeds From Sale Of Available For Sale Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_758292_511764_2_1">Proceeds from sales of available-for-sale marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:to="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherInvestments" xlink:label="us-gaap_ProceedsFromSaleOfOtherInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleOfOtherInvestments_lbl" xml:lang="en-US" id="id_758292_504187_1_1">Proceeds From Sale Of Other Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleOfOtherInvestments_lbl" xml:lang="en-US" id="id_758292_504187_2_1">Proceeds from sales of trading marketable securities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromWarrantExercises" xlink:label="us-gaap_ProceedsFromWarrantExercises"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xml:lang="en-US" id="id_758292_507569_1_1">Proceeds From Warrant Exercises</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xml:lang="en-US" id="id_758292_507569_2_1">Proceeds from warrants</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrual" xlink:label="us-gaap_ProductWarrantyAccrual"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrual_lbl" xml:lang="en-US" id="id_758292_505402_1_1">Product Warranty Accrual</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ProductWarrantyAccrual_lbl" xml:lang="en-US" id="id_758292_505402_4_1">Balance at end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ProductWarrantyAccrual_lbl" xml:lang="en-US" id="id_758292_505402_5_1">Balance at beginning of period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductWarrantyAccrual" xlink:to="us-gaap_ProductWarrantyAccrual_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition" xlink:label="us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition_lbl" xml:lang="en-US" id="id_758292_503804_1_1">Product Warranty Accrual Additions From Business Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition_lbl" xml:lang="en-US" id="id_758292_503804_2_1">Acquisition</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrualPayments" xlink:label="us-gaap_ProductWarrantyAccrualPayments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrualPayments_lbl" xml:lang="en-US" id="id_758292_502252_1_1">Product Warranty Accrual Payments</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_ProductWarrantyAccrualPayments_lbl" xml:lang="en-US" id="id_758292_502252_8_1">Settlements made during the period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductWarrantyAccrualPayments" xlink:to="us-gaap_ProductWarrantyAccrualPayments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease" xlink:label="us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_509063_1_1">Product Warranty Accrual Period Increase Decrease</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_509063_2_1">Product warranty accrual</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease" xlink:to="us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease" xlink:label="us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_498899_1_1">Product Warranty Accrual Preexisting Increase Decrease</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease_lbl" xml:lang="en-US" id="id_758292_498899_2_1">Accruals related to pre-existing warranties</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease" xlink:to="us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductWarrantyAccrualWarrantiesIssued" xlink:label="us-gaap_ProductWarrantyAccrualWarrantiesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductWarrantyAccrualWarrantiesIssued_lbl" xml:lang="en-US" id="id_758292_507945_1_1">Product Warranty Accrual Warranties Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProductWarrantyAccrualWarrantiesIssued_lbl" xml:lang="en-US" id="id_758292_507945_2_1">Accruals for warranties issued during the period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductWarrantyAccrualWarrantiesIssued" xlink:to="us-gaap_ProductWarrantyAccrualWarrantiesIssued_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US" id="id_758292_510903_1_1">Property Plant And Equipment By Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US" id="id_758292_510903_2_1">Property, Plant and Equipment, Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_508779_1_1">Property Plant And Equipment Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US" id="id_758292_508779_2_1">PROPERTY, PLANT AND EQUIPMENT</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_758292_498887_1_1">Property Plant And Equipment Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_758292_498887_6_1">Property, Plant and Equipment, Gross, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xml:lang="en-US" id="id_758292_502948_1_1">Property Plant And Equipment [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xml:lang="en-US" id="id_758292_502948_2_1">Property, Plant and Equipment [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_758292_514011_1_1">Property Plant And Equipment Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_758292_514011_2_1">Net property, plant and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_758292_514011_6_1">Net property, plant and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_500839_1_1">Property Plant And Equipment Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_500839_2_1">Property, Plant and Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US" id="id_758292_504415_1_1">Property Plant And Equipment [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US" id="id_758292_504415_2_1">Property, Plant And Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US" id="id_758292_502590_1_1">Property Plant And Equipment Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US" id="id_758292_502590_2_1">Property, Plant and Equipment, Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xml:lang="en-US" id="id_758292_498488_1_1">Property Plant And Equipment Useful Life</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xml:lang="en-US" id="id_758292_498488_2_1">Useful lives, maximum years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:to="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PropertyPlantAndEquipmentUsefulLifeDescription" xlink:label="ter_PropertyPlantAndEquipmentUsefulLifeDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_PropertyPlantAndEquipmentUsefulLifeDescription_lbl" xml:lang="en-US" id="id_758292_594693_3_1">Property plant and equipment useful life description.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_PropertyPlantAndEquipmentUsefulLifeDescription_lbl" xml:lang="en-US" id="id_758292_594693_1_1">Property Plant And Equipment Useful Life Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_PropertyPlantAndEquipmentUsefulLifeDescription_lbl" xml:lang="en-US" id="id_758292_594693_2_1">Useful lives, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_PropertyPlantAndEquipmentUsefulLifeDescription" xlink:to="ter_PropertyPlantAndEquipmentUsefulLifeDescription_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_lbl" xml:lang="en-US" id="id_758292_507641_1_1">Purchase Commitment Excluding Longterm Commitment [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_lbl" xml:lang="en-US" id="id_758292_507641_2_1">Purchase Commitment, Excluding Long-term Commitment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems" xlink:to="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_lbl" xml:lang="en-US" id="id_758292_506586_1_1">Purchase Commitment Excluding Longterm Commitment [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_lbl" xml:lang="en-US" id="id_758292_506586_2_1">Purchase Commitment, Excluding Long-term Commitment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable" xlink:to="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QOneTwoThousandElevenActivityMember" xlink:label="ter_QOneTwoThousandElevenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QOneTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594752_3_1">Q One Two Thousand Eleven Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QOneTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594752_1_1">Q One Two Thousand Eleven Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QOneTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594752_2_1">Q1 2011 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QOneTwoThousandElevenActivityMember" xlink:to="ter_QOneTwoThousandElevenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QTwoTwoThousandElevenActivityMember" xlink:label="ter_QTwoTwoThousandElevenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QTwoTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594824_3_1">Q Two Two Thousand Eleven Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QTwoTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594824_1_1">Q Two Two Thousand Eleven Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QTwoTwoThousandElevenActivityMember_lbl" xml:lang="en-US" id="id_758292_594824_2_1">Q2 2011 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QTwoTwoThousandElevenActivityMember" xlink:to="ter_QTwoTwoThousandElevenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QTwoTwoThousandTenActivityMember" xlink:label="ter_QTwoTwoThousandTenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QTwoTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594793_3_1">Q Two Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QTwoTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594793_1_1">Q Two Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QTwoTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594793_2_1">Q2 2010 Activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QTwoTwoThousandTenActivityMember" xlink:to="ter_QTwoTwoThousandTenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QTwoTwoThousandTwelveMember" xlink:label="ter_QTwoTwoThousandTwelveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QTwoTwoThousandTwelveMember_lbl" xml:lang="en-US" id="id_758292_568796_3_1">Q Two Two Thousand Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QTwoTwoThousandTwelveMember_lbl" xml:lang="en-US" id="id_758292_568796_1_1">Q Two Two Thousand Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QTwoTwoThousandTwelveMember_lbl" xml:lang="en-US" id="id_758292_568796_2_1">Q2 2012 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QTwoTwoThousandTwelveMember" xlink:to="ter_QTwoTwoThousandTwelveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterFourTwoThousandTenActionsMember" xlink:label="ter_QuarterFourTwoThousandTenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterFourTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_595057_3_1">Quarter Four Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterFourTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_595057_1_1">Quarter Four Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterFourTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_595057_2_1">Q4 2010 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterFourTwoThousandTenActionsMember" xlink:to="ter_QuarterFourTwoThousandTenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterFourTwoThousandTenActivityMember" xlink:label="ter_QuarterFourTwoThousandTenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterFourTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594927_3_1">Quarter Four Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterFourTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594927_1_1">Quarter Four Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterFourTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594927_2_1">Q4 2010 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterFourTwoThousandTenActivityMember" xlink:to="ter_QuarterFourTwoThousandTenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterlyFinancialInformationLineItems" xlink:label="ter_QuarterlyFinancialInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterlyFinancialInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518799_3_1">Quarterly Financial Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterlyFinancialInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518799_1_1">Quarterly Financial Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterlyFinancialInformationLineItems_lbl" xml:lang="en-US" id="id_758292_518799_2_1">Quarterly Financial Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterlyFinancialInformationLineItems" xlink:to="ter_QuarterlyFinancialInformationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterlyFinancialInformationTable" xlink:label="ter_QuarterlyFinancialInformationTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterlyFinancialInformationTable_lbl" xml:lang="en-US" id="id_758292_541977_3_1">Quarterly Financial Information [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterlyFinancialInformationTable_lbl" xml:lang="en-US" id="id_758292_541977_1_1">Quarterly Financial Information [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterlyFinancialInformationTable_lbl" xml:lang="en-US" id="id_758292_541977_2_1">Quarterly Financial Information [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterlyFinancialInformationTable" xlink:to="ter_QuarterlyFinancialInformationTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xml:lang="en-US" id="id_758292_510615_1_1">Quarterly Financial Information [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xml:lang="en-US" id="id_758292_510615_2_1">SUPPLEMENTARY INFORMATION</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationTextBlock" xlink:to="us-gaap_QuarterlyFinancialInformationTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterOneTwoThousandElevenActionsMember" xlink:label="ter_QuarterOneTwoThousandElevenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterOneTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594815_3_1">Quarter One Two Thousand Eleven Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterOneTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594815_1_1">Quarter One Two Thousand Eleven Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterOneTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594815_2_1">Q1 2011 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterOneTwoThousandElevenActionsMember" xlink:to="ter_QuarterOneTwoThousandElevenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterOneTwoThousandTenActionsMember" xlink:label="ter_QuarterOneTwoThousandTenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterOneTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594841_3_1">Quarter One Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterOneTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594841_1_1">Quarter One Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterOneTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594841_2_1">Q1 2010 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterOneTwoThousandTenActionsMember" xlink:to="ter_QuarterOneTwoThousandTenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterOneTwoThousandTenActivityMember" xlink:label="ter_QuarterOneTwoThousandTenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterOneTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594999_3_1">Quarter One Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterOneTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594999_1_1">Quarter One Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterOneTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594999_2_1">Q1 2010 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterOneTwoThousandTenActivityMember" xlink:to="ter_QuarterOneTwoThousandTenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterThreeTwoThousandTenActionsMember" xlink:label="ter_QuarterThreeTwoThousandTenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterThreeTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594830_3_1">Quarter Three Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterThreeTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594830_1_1">Quarter Three Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterThreeTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594830_2_1">Q3 2010 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterThreeTwoThousandTenActionsMember" xlink:to="ter_QuarterThreeTwoThousandTenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterThreeTwoThousandTenActivityMember" xlink:label="ter_QuarterThreeTwoThousandTenActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterThreeTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594836_3_1">Quarter Three Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterThreeTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594836_1_1">Quarter Three Two Thousand Ten Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterThreeTwoThousandTenActivityMember_lbl" xml:lang="en-US" id="id_758292_594836_2_1">Q3 2010 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterThreeTwoThousandTenActivityMember" xlink:to="ter_QuarterThreeTwoThousandTenActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterThreeTwoThousandTwelveActivityMember" xlink:label="ter_QuarterThreeTwoThousandTwelveActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterThreeTwoThousandTwelveActivityMember_lbl" xml:lang="en-US" id="id_758292_611731_3_1">Quarter Three Two Thousand Twelve Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterThreeTwoThousandTwelveActivityMember_lbl" xml:lang="en-US" id="id_758292_611731_1_1">Quarter Three Two Thousand Twelve Activity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterThreeTwoThousandTwelveActivityMember_lbl" xml:lang="en-US" id="id_758292_611731_2_1">Q3 2012 Activity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterThreeTwoThousandTwelveActivityMember" xlink:to="ter_QuarterThreeTwoThousandTwelveActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterTwoTwoThousandElevenActionsMember" xlink:label="ter_QuarterTwoTwoThousandElevenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterTwoTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594842_3_1">Quarter Two Two Thousand Eleven Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterTwoTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594842_1_1">Quarter Two Two Thousand Eleven Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterTwoTwoThousandElevenActionsMember_lbl" xml:lang="en-US" id="id_758292_594842_2_1">Q2 2011 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterTwoTwoThousandElevenActionsMember" xlink:to="ter_QuarterTwoTwoThousandElevenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_QuarterTwoTwoThousandTenActionsMember" xlink:label="ter_QuarterTwoTwoThousandTenActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_QuarterTwoTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594867_3_1">Quarter Two Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_QuarterTwoTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594867_1_1">Quarter Two Two Thousand Ten Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_QuarterTwoTwoThousandTenActionsMember_lbl" xml:lang="en-US" id="id_758292_594867_2_1">Q2 2010 Actions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_QuarterTwoTwoThousandTenActionsMember" xlink:to="ter_QuarterTwoTwoThousandTenActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="us-gaap_RangeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeAxis_lbl" xml:lang="en-US" id="id_758292_504957_1_1">Range [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RangeAxis_lbl" xml:lang="en-US" id="id_758292_504957_2_1">Range</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeAxis" xlink:to="us-gaap_RangeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RangeFourMember" xlink:label="ter_RangeFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RangeFourMember_lbl" xml:lang="en-US" id="id_758292_537831_3_1">Range Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RangeFourMember_lbl" xml:lang="en-US" id="id_758292_537831_1_1">Range Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RangeFourMember_lbl" xml:lang="en-US" id="id_758292_537831_2_1">Range Four</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RangeFourMember" xlink:to="ter_RangeFourMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="us-gaap_RangeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US" id="id_758292_498452_1_1">Range [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US" id="id_758292_498452_2_1">Range [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeMember" xlink:to="us-gaap_RangeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RangeOneMember" xlink:label="ter_RangeOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RangeOneMember_lbl" xml:lang="en-US" id="id_758292_537828_3_1">Range One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RangeOneMember_lbl" xml:lang="en-US" id="id_758292_537828_1_1">Range One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RangeOneMember_lbl" xml:lang="en-US" id="id_758292_537828_2_1">Range One</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RangeOneMember" xlink:to="ter_RangeOneMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RangeThreeMember" xlink:label="ter_RangeThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RangeThreeMember_lbl" xml:lang="en-US" id="id_758292_537830_3_1">Range Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RangeThreeMember_lbl" xml:lang="en-US" id="id_758292_537830_1_1">Range Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RangeThreeMember_lbl" xml:lang="en-US" id="id_758292_537830_2_1">Range Three</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RangeThreeMember" xlink:to="ter_RangeThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RangeTwoMember" xlink:label="ter_RangeTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RangeTwoMember_lbl" xml:lang="en-US" id="id_758292_537829_3_1">Range Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RangeTwoMember_lbl" xml:lang="en-US" id="id_758292_537829_1_1">Range Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RangeTwoMember_lbl" xml:lang="en-US" id="id_758292_537829_2_1">Range Two</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RangeTwoMember" xlink:to="ter_RangeTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RemainingAccrualForLeasePayments" xlink:label="ter_RemainingAccrualForLeasePayments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RemainingAccrualForLeasePayments_lbl" xml:lang="en-US" id="id_758292_594820_3_1">Remaining accrual for lease payments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RemainingAccrualForLeasePayments_lbl" xml:lang="en-US" id="id_758292_594820_1_1">Remaining Accrual For Lease Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RemainingAccrualForLeasePayments_lbl" xml:lang="en-US" id="id_758292_594820_2_1">Remaining accrual for lease payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RemainingAccrualForLeasePayments" xlink:to="ter_RemainingAccrualForLeasePayments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US" id="id_758292_499971_1_1">Repayments Of Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US" id="id_758292_499971_8_1">Payments of long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLongTermDebt" xlink:to="us-gaap_RepaymentsOfLongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost" xlink:label="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_lbl" xml:lang="en-US" id="id_758292_502279_1_1">Research And Development Expense Excluding Acquired In Process Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_lbl" xml:lang="en-US" id="id_758292_502279_2_1">Engineering and development</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost" xlink:to="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_RestOfWorldMember" xlink:label="ter_RestOfWorldMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RestOfWorldMember_lbl" xml:lang="en-US" id="id_758292_533660_3_1">Rest Of The World [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RestOfWorldMember_lbl" xml:lang="en-US" id="id_758292_533660_1_1">Rest Of World [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RestOfWorldMember_lbl" xml:lang="en-US" id="id_758292_533660_2_1">Rest Of The World</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_RestOfWorldMember" xlink:to="ter_RestOfWorldMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xml:lang="en-US" id="id_758292_509954_1_1">Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xml:lang="en-US" id="id_758292_509954_2_1">Restricted Cash and Cash Equivalents</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RestructuringActionDomain_lbl" xml:lang="en-US" id="id_758292_594961_3_1">Restructuring Action [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RestructuringActionDomain_lbl" xml:lang="en-US" id="id_758292_594961_1_1">Restructuring Action [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RestructuringActionDomain_lbl" xml:lang="en-US" id="id_758292_594961_2_1">Restructuring Action [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RestructuringAndOtherCharges_lbl" xml:lang="en-US" id="id_758292_551008_3_1">Restructuring And Other Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RestructuringAndOtherCharges_lbl" xml:lang="en-US" id="id_758292_551008_1_1">Restructuring And Other Charges</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_RestructuringAndOtherNet_lbl" xml:lang="en-US" id="id_758292_595086_3_1">Restructuring and other, net.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RestructuringAndOtherNet_lbl" xml:lang="en-US" id="id_758292_595086_1_1">Restructuring And Other Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_RestructuringAndOtherNet_lbl" xml:lang="en-US" id="id_758292_595086_2_1">Restructuring and other, net</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl" xml:lang="en-US" id="id_758292_500619_2_1">Reduction in employees head count</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringCharges_lbl" xml:lang="en-US" id="id_758292_506397_1_1">Restructuring Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCharges_lbl" xml:lang="en-US" id="id_758292_506397_2_1">Provision</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xml:lang="en-US" id="id_758292_510660_2_1">Restructuring Type</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xml:lang="en-US" id="id_758292_513024_2_1">Restructuring Cost and Reserve</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xml:lang="en-US" id="id_758292_501905_2_1">Restructuring Plan [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_RestructuringReserveOther_lbl" xml:lang="en-US" id="id_758292_594828_1_1">Restructuring Reserve Other</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="ter_RestructuringReserveOther_lbl" xml:lang="en-US" id="id_758292_594828_8_1">Other</label>
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    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_RestructuringReserveSettledWithCash_lbl" xml:lang="en-US" id="id_758292_509862_8_1">Cash payments</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_lbl" xml:lang="en-US" id="id_758292_501773_1_1">Restructuring Settlement And Impairment Provisions</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_SavingsPlanLineItems_lbl" xml:lang="en-US" id="id_758292_594829_1_1">Savings Plan [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SavingsPlanLineItems_lbl" xml:lang="en-US" id="id_758292_594829_2_1">Savings Plan [Line Items]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SavingsPlanMember_lbl" xml:lang="en-US" id="id_758292_532827_2_1">Savings Plan</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ScheduleOfAccruedLiabilitiesLineItems_lbl" xml:lang="en-US" id="id_758292_518820_1_1">Schedule Of Accrued Liabilities [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ScheduleOfAccruedLiabilitiesLineItems_lbl" xml:lang="en-US" id="id_758292_518820_2_1">Schedule of Accrued Liabilities [Line Items]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ScheduleOfAccruedLiabilitiesTable_lbl" xml:lang="en-US" id="id_758292_542011_1_1">Schedule Of Accrued Liabilities [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ScheduleOfAccruedLiabilitiesTable_lbl" xml:lang="en-US" id="id_758292_542011_2_1">Schedule of Accrued Liabilities [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ScheduleOfAccruedLiabilitiesTable" xlink:to="ter_ScheduleOfAccruedLiabilitiesTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock" xlink:label="us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_lbl" xml:lang="en-US" id="id_758292_513333_2_1">Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageContractualTermsTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594931_1_1">Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Contractual Terms Table [Text Block]</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock" xlink:label="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594756_3_1">Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Total Shares Available Table Text Block</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594756_1_1">Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Total Shares Available Table [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594756_2_1">Share Based Compensation Total Shares Available</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock" xlink:to="ter_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardTotalSharesAvailableTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xml:lang="en-US" id="id_758292_504588_1_1">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xml:lang="en-US" id="id_758292_504588_2_1">Schedule of Share-based Compensation Arrangements by Share-based Payment Award</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xml:lang="en-US" id="id_758292_514487_1_1">Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xml:lang="en-US" id="id_758292_514487_2_1">Weighted-Average Restricted Stock Unit Award Date Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xml:lang="en-US" id="id_758292_499471_1_1">Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xml:lang="en-US" id="id_758292_499471_2_1">Restricted Stock Unit Awards Aggregate Intrinsic Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_lbl" xml:lang="en-US" id="id_758292_507714_1_1">Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_lbl" xml:lang="en-US" id="id_758292_507714_2_1">Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US" id="id_758292_507270_2_1">Significant Option Groups Outstanding</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xml:lang="en-US" id="id_758292_513996_2_1">Fair Value of Stock Options Using Assumptions</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ScheduleOfTargetAssetAllocationTableTextBlock_lbl" xml:lang="en-US" id="id_758292_594874_1_1">Schedule Of Target Asset Allocation Table [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US" id="id_758292_510985_1_1">Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term 2</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl" xml:lang="en-US" id="id_758292_508857_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_lbl" xml:lang="en-US" id="id_758292_505055_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xml:lang="en-US" id="id_758292_510925_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xml:lang="en-US" id="id_758292_501455_2_1">Common stock price, percentage</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod_lbl" xml:lang="en-US" id="id_758292_657139_3_1">Share Based Compensation Arrangement By Share Based Payment Awards Options Grants In Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod_lbl" xml:lang="en-US" id="id_758292_657139_1_1">Share Based Compensation Arrangement By Share Based Payment Awards Options Grants In Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod_lbl" xml:lang="en-US" id="id_758292_657139_2_1">Stock options granted</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUponOneYearAnniversaryOfDateOfGrant_lbl" xml:lang="en-US" id="id_758292_553231_3_1">Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Upon One Year Anniversary Of Date Of Grant</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUponOneYearAnniversaryOfDateOfGrant_lbl" xml:lang="en-US" id="id_758292_553231_1_1">Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Upon One Year Anniversary Of Date Of Grant</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xml:lang="en-US" id="id_758292_499605_2_1">Award Type [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_758292_505372_1_1">Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_758292_502727_2_1">Statement of Stockholders' Equity [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl"/>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockBasedCompensationMember" xlink:label="ter_StockBasedCompensationMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockBasedCompensationMember_lbl" xml:lang="en-US" id="id_758292_553052_1_1">Stock Based Compensation [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockBasedCompensationMember_lbl" xml:lang="en-US" id="id_758292_553052_2_1">Stock Based Compensation</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockCompensationPlansAndEmployeeStockPurchasePlanPolicyTextBlock" xlink:label="ter_StockCompensationPlansAndEmployeeStockPurchasePlanPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockCompensationPlansAndEmployeeStockPurchasePlanPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594967_3_1">Stock Compensation Plans And Employee Stock Purchase Plan [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockCompensationPlansAndEmployeeStockPurchasePlanPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594967_1_1">Stock Compensation Plans And Employee Stock Purchase Plan Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockCompensationPlansAndEmployeeStockPurchasePlanPolicyTextBlock_lbl" xml:lang="en-US" id="id_758292_594967_2_1">Stock Compensation Plans and Employee Stock Purchase Plan</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US" id="id_758292_500872_1_1">Stockholders Equity</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US" id="id_758292_500872_6_1">Total shareholders' equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_758292_498963_1_1">Stockholders Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_758292_498963_2_1">SHAREHOLDERS' EQUITY</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xml:lang="en-US" id="id_758292_507282_1_1">Stock Issued During Period Shares Employee Stock Purchase Plans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xml:lang="en-US" id="id_758292_507282_2_1">Common stock issued to employees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:to="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions" xlink:label="ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions_lbl" xml:lang="en-US" id="id_758292_683170_3_1">Stock Issued During Period Shares Sale Of Stock And Exercise Of Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions_lbl" xml:lang="en-US" id="id_758292_683170_1_1">Stock Issued During Period Shares Sale Of Stock And Exercise Of Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions_lbl" xml:lang="en-US" id="id_758292_683170_2_1">Exercise of stock options</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US" id="id_758292_502579_1_1">Stock Issued During Period Shares Stock Options Exercised</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes" xlink:label="ter_StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes_lbl" xml:lang="en-US" id="id_758292_523158_3_1">Stock Issued During Period, Value, Share Based Compensation, Net of Shares Withheld for Taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes_lbl" xml:lang="en-US" id="id_758292_523158_1_1">Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes_lbl" xml:lang="en-US" id="id_758292_523158_2_1">Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionMember" xlink:label="us-gaap_StockOptionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionMember_lbl" xml:lang="en-US" id="id_758292_506554_1_1">Stock Option [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockOptionMember_lbl" xml:lang="en-US" id="id_758292_506554_2_1">Stock Option</label>
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    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockOptionsIssuedInPurchaseAcquisition" xlink:label="ter_StockOptionsIssuedInPurchaseAcquisition"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockOptionsIssuedInPurchaseAcquisition_lbl" xml:lang="en-US" id="id_758292_594788_3_1">Stock Options Issued In Purchase Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockOptionsIssuedInPurchaseAcquisition_lbl" xml:lang="en-US" id="id_758292_594788_1_1">Stock Options Issued In Purchase Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockOptionsIssuedInPurchaseAcquisition_lbl" xml:lang="en-US" id="id_758292_594788_2_1">Stock options issued in purchase acquisition</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="us-gaap_StockOptionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US" id="id_758292_514283_1_1">Stock Options [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US" id="id_758292_514283_2_1">Stock Options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionsMember" xlink:to="us-gaap_StockOptionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_StockPurchaseRightsMember" xlink:label="ter_StockPurchaseRightsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockPurchaseRightsMember_lbl" xml:lang="en-US" id="id_758292_594915_3_1">Stock Purchase Rights</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockPurchaseRightsMember_lbl" xml:lang="en-US" id="id_758292_594915_1_1">Stock Purchase Rights [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockPurchaseRightsMember_lbl" xml:lang="en-US" id="id_758292_594915_2_1">Stock Purchase Rights</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_StockPurchaseRightsMember" xlink:to="ter_StockPurchaseRightsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xml:lang="en-US" id="id_758292_508932_1_1">Stock Repurchased During Period Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xml:lang="en-US" id="id_758292_508932_2_1">Repurchase of stock, shares</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xml:lang="en-US" id="id_758292_508932_8_1">Repurchase of common stock, shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedDuringPeriodShares" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xml:lang="en-US" id="id_758292_503635_1_1">Stock Repurchased During Period Value</label>
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    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xml:lang="en-US" id="id_758292_503635_8_1">Repurchase of common stock</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_StockRepurchaseProgramLineItems_lbl" xml:lang="en-US" id="id_758292_549203_3_1">Stock Repurchase Program [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_StockRepurchaseProgramLineItems_lbl" xml:lang="en-US" id="id_758292_549203_1_1">Stock Repurchase Program [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_StockRepurchaseProgramLineItems_lbl" xml:lang="en-US" id="id_758292_549203_2_1">Stock Repurchase Program</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_758292_511390_1_1">Subsequent Event [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_758292_511390_2_1">Subsequent Event</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_758292_506663_1_1">Subsequent Event Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_758292_506663_2_1">Subsequent Event Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_758292_510912_2_1">Subsequent Event Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_SubtotalMember" xlink:label="ter_SubtotalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_SubtotalMember_lbl" xml:lang="en-US" id="id_758292_590200_3_1">Subtotal [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_SubtotalMember_lbl" xml:lang="en-US" id="id_758292_590200_1_1">Subtotal [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SubtotalMember_lbl" xml:lang="en-US" id="id_758292_590200_2_1">Subtotal</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SummaryOfIncomeTaxContingenciesTextBlock" xlink:label="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl" xml:lang="en-US" id="id_758292_506553_1_1">Summary Of Income Tax Contingencies [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl" xml:lang="en-US" id="id_758292_506553_2_1">Unrecognized Tax Benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock" xlink:to="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock" xlink:label="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_lbl" xml:lang="en-US" id="id_758292_504920_1_1">Summary Of Operating Loss Carryforwards [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_lbl" xml:lang="en-US" id="id_758292_504920_2_1">Operating Loss Carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock" xlink:to="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_SummaryOfSignificantAccountingPoliciesLineItems" xlink:label="ter_SummaryOfSignificantAccountingPoliciesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_758292_519022_3_1">Summary Of Significant Accounting Policies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_758292_519022_1_1">Summary Of Significant Accounting Policies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_758292_519022_2_1">Summary Of Significant Accounting Policies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_SummaryOfSignificantAccountingPoliciesLineItems" xlink:to="ter_SummaryOfSignificantAccountingPoliciesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_SummaryOfSignificantAccountingPoliciesTable" xlink:label="ter_SummaryOfSignificantAccountingPoliciesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_SummaryOfSignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_758292_541656_3_1">Summary Of Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_SummaryOfSignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_758292_541656_1_1">Summary Of Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SummaryOfSignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_758292_541656_2_1">Summary Of Significant Accounting Policies [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_SummaryOfSignificantAccountingPoliciesTable" xlink:to="ter_SummaryOfSignificantAccountingPoliciesTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US" id="id_758292_498644_1_1">Supplemental Cash Flow Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US" id="id_758292_498644_2_1">Supplementary disclosure of cash flow information:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_SystemsTestGroupMember" xlink:label="ter_SystemsTestGroupMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_SystemsTestGroupMember_lbl" xml:lang="en-US" id="id_758292_595070_3_1">Systems Test Group [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_SystemsTestGroupMember_lbl" xml:lang="en-US" id="id_758292_595070_1_1">Systems Test Group [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_SystemsTestGroupMember_lbl" xml:lang="en-US" id="id_758292_595070_2_1">Systems Test Group</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_SystemsTestGroupMember" xlink:to="ter_SystemsTestGroupMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TaiwanDollarMember" xlink:label="ter_TaiwanDollarMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TaiwanDollarMember_lbl" xml:lang="en-US" id="id_758292_595085_3_1">Taiwan Dollar [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TaiwanDollarMember_lbl" xml:lang="en-US" id="id_758292_595085_1_1">Taiwan Dollar [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TaiwanDollarMember_lbl" xml:lang="en-US" id="id_758292_595085_2_1">Taiwan Dollar</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TaiwanDollarMember" xlink:to="ter_TaiwanDollarMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxBenefitFromStockOptionsExercised1" xlink:label="us-gaap_TaxBenefitFromStockOptionsExercised1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxBenefitFromStockOptionsExercised1_lbl" xml:lang="en-US" id="id_758292_512661_1_1">Tax Benefit From Stock Options Exercised 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxBenefitFromStockOptionsExercised1_lbl" xml:lang="en-US" id="id_758292_512661_2_1">Tax benefit related to stock options and restricted stock units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxBenefitFromStockOptionsExercised1" xlink:to="us-gaap_TaxBenefitFromStockOptionsExercised1_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits" xlink:label="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits_lbl" xml:lang="en-US" id="id_758292_521936_3_1">Tax Benefit From Stock Options Exercised And Vesting Of Restricted Stock Awards And Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits_lbl" xml:lang="en-US" id="id_758292_521936_1_1">Tax Benefit From Stock Options Exercised And Vesting Of Restricted Stock Awards And Units</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits_lbl" xml:lang="en-US" id="id_758292_521936_8_1">Tax benefit related to stock options and restricted stock units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits" xlink:to="ter_TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="us-gaap_TaxCreditCarryforwardAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardAmount_lbl" xml:lang="en-US" id="id_758292_513684_1_1">Tax Credit Carryforward Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardAmount_lbl" xml:lang="en-US" id="id_758292_513684_2_1">Tax credit carry forwards, approximately</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardAmount" xlink:to="us-gaap_TaxCreditCarryforwardAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:label="us-gaap_TaxCreditCarryforwardAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardAxis_lbl" xml:lang="en-US" id="id_758292_502984_1_1">Tax Credit Carryforward [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardAxis_lbl" xml:lang="en-US" id="id_758292_502984_2_1">Tax Credit Carryforward [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardAxis" xlink:to="us-gaap_TaxCreditCarryforwardAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TaxCreditCarryforwardExpirationYear" xlink:label="ter_TaxCreditCarryforwardExpirationYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_758292_529355_3_1">Tax Credit Carryforward, Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_758292_529355_1_1">Tax Credit Carryforward Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_758292_529355_2_1">Tax credit carryforward, expiration date</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain_lbl" xml:lang="en-US" id="id_758292_505286_1_1">Tax Credit Carryforward Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain_lbl" xml:lang="en-US" id="id_758292_505286_2_1">Tax Credit Carryforward, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardNameDomain" xlink:to="us-gaap_TaxCreditCarryforwardNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TermOfAmortization" xlink:label="ter_TermOfAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TermOfAmortization_lbl" xml:lang="en-US" id="id_758292_594852_3_1">Term Of Amortization.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TermOfAmortization_lbl" xml:lang="en-US" id="id_758292_594852_1_1">Term Of Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TermOfAmortization_lbl" xml:lang="en-US" id="id_758292_594852_2_1">Term of amortization, years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TermOfAmortization" xlink:to="ter_TermOfAmortization_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TermOfLoan" xlink:label="ter_TermOfLoan"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TermOfLoan_lbl" xml:lang="en-US" id="id_758292_564878_3_1">Term of loan, years.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TermOfLoan_lbl" xml:lang="en-US" id="id_758292_564878_1_1">Term Of Loan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TermOfLoan_lbl" xml:lang="en-US" id="id_758292_564878_2_1">Term of loan, years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TermOfLoan" xlink:to="ter_TermOfLoan_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TestSystemsManufacturedInternallyMember" xlink:label="ter_TestSystemsManufacturedInternallyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TestSystemsManufacturedInternallyMember_lbl" xml:lang="en-US" id="id_758292_594877_3_1">Test Systems Manufactured Internally [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TestSystemsManufacturedInternallyMember_lbl" xml:lang="en-US" id="id_758292_594877_1_1">Test Systems Manufactured Internally [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TestSystemsManufacturedInternallyMember_lbl" xml:lang="en-US" id="id_758292_594877_2_1">Test Systems Manufactured Internally</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TestSystemsManufacturedInternallyMember" xlink:to="ter_TestSystemsManufacturedInternallyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TextBlockAbstract" xlink:label="us-gaap_TextBlockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_758292_499125_1_1">Text Block [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_758292_499125_2_1">Text Block [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TextBlockAbstract" xlink:to="us-gaap_TextBlockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_TH" xlink:label="country_TH"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_TH_lbl" xml:lang="en-US" id="id_758292_497576_1_1">T H</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_TH_lbl" xml:lang="en-US" id="id_758292_497576_2_1">THAILAND</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_TH" xlink:to="country_TH_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xml:lang="en-US" id="id_758292_502975_1_1">Title Of Individual With Relationship To Entity [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xml:lang="en-US" id="id_758292_502975_2_1">Title of Individual with Relationship to Entity [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalAssetsFromContinuingOperations" xlink:label="ter_TotalAssetsFromContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TotalAssetsFromContinuingOperations_lbl" xml:lang="en-US" id="id_758292_594817_3_1">Total assets from continuing operations.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TotalAssetsFromContinuingOperations_lbl" xml:lang="en-US" id="id_758292_594817_1_1">Total Assets From Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TotalAssetsFromContinuingOperations_lbl" xml:lang="en-US" id="id_758292_594817_2_1">Total assets from continuing operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TotalAssetsFromContinuingOperations" xlink:to="ter_TotalAssetsFromContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalDeferredRevenueAndCustomerAdvances" xlink:label="ter_TotalDeferredRevenueAndCustomerAdvances"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TotalDeferredRevenueAndCustomerAdvances_lbl" xml:lang="en-US" id="id_758292_595087_3_1">Total deferred revenue and customer advances.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TotalDeferredRevenueAndCustomerAdvances_lbl" xml:lang="en-US" id="id_758292_595087_1_1">Total Deferred Revenue And Customer Advances</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="ter_TotalDeferredRevenueAndCustomerAdvances_lbl" xml:lang="en-US" id="id_758292_595087_6_1">Total deferred revenue and customer advances</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TotalDeferredRevenueAndCustomerAdvances" xlink:to="ter_TotalDeferredRevenueAndCustomerAdvances_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_594935_3_1">Total income tax provision benefit from continuing operations and discontinued operations.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_594935_1_1">Total Income Tax Provision Benefit From Continuing Operations And Discontinued Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_594935_2_1">Income tax provision (benefit) errors</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations_lbl" xml:lang="en-US" id="id_758292_594935_6_1">Total income tax provision (benefit)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations" xlink:to="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes" xlink:label="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes_lbl" xml:lang="en-US" id="id_758292_595088_3_1">Total stock based compensation expenses after income taxes.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes_lbl" xml:lang="en-US" id="id_758292_595088_1_1">Total Stock Based Compensation Expenses After Income Taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes_lbl" xml:lang="en-US" id="id_758292_595088_2_1">Total stock-based compensation expense after income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes" xlink:to="ter_TotalStockBasedCompensationExpensesAfterIncomeTaxes_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TradeAndOtherAccountsReceivablePolicy" xlink:label="us-gaap_TradeAndOtherAccountsReceivablePolicy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TradeAndOtherAccountsReceivablePolicy_lbl" xml:lang="en-US" id="id_758292_500440_1_1">Trade And Other Accounts Receivable Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TradeAndOtherAccountsReceivablePolicy_lbl" xml:lang="en-US" id="id_758292_500440_2_1">Accounts Receivable and Allowance for Doubtful Accounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TradeAndOtherAccountsReceivablePolicy" xlink:to="us-gaap_TradeAndOtherAccountsReceivablePolicy_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TradenamesAndTrademarksMember" xlink:label="ter_TradenamesAndTrademarksMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TradenamesAndTrademarksMember_lbl" xml:lang="en-US" id="id_758292_532603_3_1">Trade Names and TradeMarks [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TradenamesAndTrademarksMember_lbl" xml:lang="en-US" id="id_758292_532603_1_1">Tradenames And Trademarks [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TradenamesAndTrademarksMember_lbl" xml:lang="en-US" id="id_758292_532603_2_1">Trade Names And Trademarks</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TradenamesAndTrademarksMember" xlink:to="ter_TradenamesAndTrademarksMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="us-gaap_TradeNamesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TradeNamesMember_lbl" xml:lang="en-US" id="id_758292_515009_1_1">Trade Names [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TradeNamesMember_lbl" xml:lang="en-US" id="id_758292_515009_2_1">Trade Names</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TradeNamesMember" xlink:to="us-gaap_TradeNamesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_758292_497703_1_1">Trading Symbol</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_758292_497703_2_1">Trading Symbol</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TransactionFees" xlink:label="ter_TransactionFees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TransactionFees_lbl" xml:lang="en-US" id="id_758292_523173_3_1">Transaction Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TransactionFees_lbl" xml:lang="en-US" id="id_758292_523173_1_1">Transaction Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TransactionFees_lbl" xml:lang="en-US" id="id_758292_523173_2_1">Transaction fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TransactionFees" xlink:to="ter_TransactionFees_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:label="us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockAcquiredAverageCostPerShare_lbl" xml:lang="en-US" id="id_758292_508429_1_1">Treasury Stock Acquired Average Cost Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TreasuryStockAcquiredAverageCostPerShare_lbl" xml:lang="en-US" id="id_758292_508429_2_1">Common stock average price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:to="us-gaap_TreasuryStockAcquiredAverageCostPerShare_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_TW" xlink:label="country_TW"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_TW_lbl" xml:lang="en-US" id="id_758292_497562_1_1">T W</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_TW_lbl" xml:lang="en-US" id="id_758292_497562_2_1">TAIWAN, PROVINCE OF CHINA</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_TW" xlink:to="country_TW_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TwentyZeroSixIncentiveCompensationPlanMember" xlink:label="ter_TwentyZeroSixIncentiveCompensationPlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_TwentyZeroSixIncentiveCompensationPlanMember_lbl" xml:lang="en-US" id="id_758292_625569_3_1">Twenty Zero Six Incentive Compensation Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_TwentyZeroSixIncentiveCompensationPlanMember_lbl" xml:lang="en-US" id="id_758292_625569_1_1">Twenty Zero Six Incentive Compensation Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_TwentyZeroSixIncentiveCompensationPlanMember_lbl" xml:lang="en-US" id="id_758292_625569_2_1">Twenty Zero Six Incentive Compensation Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_TwentyZeroSixIncentiveCompensationPlanMember" xlink:to="ter_TwentyZeroSixIncentiveCompensationPlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="us-gaap_TypeOfRestructuringDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xml:lang="en-US" id="id_758292_500805_1_1">Type Of Restructuring [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xml:lang="en-US" id="id_758292_500805_2_1">Type of Restructuring [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfRestructuringDomain" xlink:to="us-gaap_TypeOfRestructuringDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xml:lang="en-US" id="id_758292_514067_1_1">Unamortized Debt Issuance Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xml:lang="en-US" id="id_758292_514067_2_1">Debt issuance costs, amortized to interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedDebtIssuanceExpense" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_UnitedKingdomDefinedBenefitPensionPlanMember" xlink:label="ter_UnitedKingdomDefinedBenefitPensionPlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnitedKingdomDefinedBenefitPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594851_3_1">United.Kingdom. Defined Benefit Pension Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_UnitedKingdomDefinedBenefitPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594851_1_1">United Kingdom Defined Benefit Pension Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_UnitedKingdomDefinedBenefitPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594851_2_1">U.K. Defined Benefit Pension Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_UnitedKingdomDefinedBenefitPensionPlanMember" xlink:to="ter_UnitedKingdomDefinedBenefitPensionPlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_UnitedKingdomGovernmentSecuritiesMember" xlink:label="ter_UnitedKingdomGovernmentSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnitedKingdomGovernmentSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_595073_3_1">United.Kingdom. Government Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_UnitedKingdomGovernmentSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_595073_1_1">United Kingdom Government Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ter_UnitedKingdomGovernmentSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_595073_2_1">U.K. Government Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_UnitedKingdomGovernmentSecuritiesMember" xlink:to="ter_UnitedKingdomGovernmentSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_UnitedStatesEquityLargeCapMember" xlink:label="ter_UnitedStatesEquityLargeCapMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnitedStatesEquityLargeCapMember_lbl" xml:lang="en-US" id="id_758292_594986_3_1">United.States. Equity (Large Cap) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_UnitedStatesEquityLargeCapMember_lbl" xml:lang="en-US" id="id_758292_594986_1_1">United States Equity Large Cap [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ter_UnitedStatesEquityLargeCapMember" xlink:to="ter_UnitedStatesEquityLargeCapMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnitedStatesQualifiedPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594880_3_1">United.States. Qualified Pension Plan [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnoccupiedSpaceSubleased_lbl" xml:lang="en-US" id="id_758292_594913_3_1">The company has subleased approximately 53% of its unoccupied space</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestmentsAbstract" xlink:label="us-gaap_UnrealizedGainLossOnInvestmentsAbstract"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_lbl" xml:lang="en-US" id="id_758292_502851_1_1">Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_lbl" xml:lang="en-US" id="id_758292_502851_8_1">Reductions, Tax positions for prior years</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities" xlink:label="us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_UnrecognizedTaxBenefitsIfRecognizedWouldImpactValuationAllowance_lbl" xml:lang="en-US" id="id_758292_594757_3_1">Unrecognized tax benefits, if recognized would impact valuation allowance.</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_lbl" xml:lang="en-US" id="id_758292_512568_1_1">Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="us-gaap_UnsecuredDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnsecuredDebt_lbl" xml:lang="en-US" id="id_758292_498435_1_1">Unsecured Debt</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_US" xlink:label="country_US"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_US_lbl" xml:lang="en-US" id="id_758292_497488_1_1">U S</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_US_lbl" xml:lang="en-US" id="id_758292_497488_2_1">UNITED STATES</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_500661_1_1">U S Government Corporations And Agencies Securities [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember" xlink:to="us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="us-gaap_USGovernmentDebtSecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_USGovernmentDebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_501652_1_1">U S Government Debt Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_USGovernmentDebtSecuritiesMember_lbl" xml:lang="en-US" id="id_758292_501652_2_1">US Government Debt Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USGovernmentDebtSecuritiesMember" xlink:to="us-gaap_USGovernmentDebtSecuritiesMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="ter_USQualifiedPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594839_3_1">U.S. Qualified Pension Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ter_USQualifiedPensionPlanMember_lbl" xml:lang="en-US" id="id_758292_594839_1_1">U S Qualified Pension Plan [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ValuationAllowanceAmount_lbl" xml:lang="en-US" id="id_758292_506892_1_1">Valuation Allowance Amount</label>
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