<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Calculation 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. -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DocumentDocumentandEntityInformation" roleURI="http://www.teradyne.com/taxonomy/role/DocumentDocumentandEntityInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfFinancialPositionClassified" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfFinancialPositionClassified"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfFinancialPositionClassifiedParen" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfIncome" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfIncome"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfIncomeParen" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfIncomeParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfOtherComprehensiveIncome" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfOtherComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_ci-StatementOfShareholdersEquityAndOtherComprehensiveIncome" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_ci-StatementOfShareholdersEquityAndOtherComprehensiveIncomeParen" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncomeParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_StatementOfCashFlowsIndirect" roleURI="http://www.teradyne.com/taxonomy/role/StatementOfCashFlowsIndirect"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureDeferredRevenueAndCustomerAdvances" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureDeferredRevenueAndCustomerAdvances"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureOtherAccruedLiabilities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureOtherAccruedLiabilities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureUsefulLivesOfAssets" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureUsefulLivesOfAssets"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureAccountingPoliciesAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureStockBasedCompensation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureStockBasedCompensation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureBlackScholesOptionPricingModel" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureBlackScholesOptionPricingModel"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfEstimatedFairValueOfStockOptionsAssumptions" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEstimatedFairValueOfStockOptionsAssumptions"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureChangeInAccountingPrincipleAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureChangeInAccountingPrincipleAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedBalanceSheets" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedBalanceSheets"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedStatementsOfOperations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfOperations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedStatementsOfOperationsParenthetical" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfOperationsParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCondensedConsolidatedStatementsOfCashFlows" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfCashFlows"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureDiscontinuedOperationsAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureDiscontinuedOperationsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureDiscontinuedOperations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureDiscontinuedOperations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureAcquisitionsAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureAcquisitionsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfFairValueOfStockOptionsEstimatedUsingWeightedAverageAssumptions" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfStockOptionsEstimatedUsingWeightedAverageAssumptions"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureAllocationOfPurchasePrice" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureAllocationOfPurchasePrice"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureComponentsOfOtherIntangibleAssetsAndEstimatedUsefulLives" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureComponentsOfOtherIntangibleAssetsAndEstimatedUsefulLives"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureProFormaResultsUnderAcquisitions" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureProFormaResultsUnderAcquisitions"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosurePropertyPlantAndEquipment" roleURI="http://www.teradyne.com/taxonomy/role/DisclosurePropertyPlantAndEquipment"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosurePropertyPlantAndEquipmentAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureFinancialInstrumentsAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureFinancialInstrumentsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfFairValueOfFinancialAssetsAndLiabilitiesMeasuredOnRecurringBasis" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfFinancialAssetsAndLiabilitiesMeasuredOnRecurringBasis"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfReportedFinancialAssetsAndLiabilities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReportedFinancialAssetsAndLiabilities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfChangesInFairValueOfLevelThreeContingentConsideration" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfChangesInFairValueOfLevelThreeContingentConsideration"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfCarryingAmountsAndFairValuesOfFinancialInstrument" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCarryingAmountsAndFairValuesOfFinancialInstrument"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfAvailableForSaleMarketableSecurities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAvailableForSaleMarketableSecurities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfReportedAvailableForSaleMarketableSecurities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReportedAvailableForSaleMarketableSecurities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureContractualMaturitiesOfAvailableForSaleMarketableSecurities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureContractualMaturitiesOfAvailableForSaleMarketableSecurities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfNotionalAmountOfDerivatives" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfNotionalAmountOfDerivatives"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfFairValueOfDerivativeInstruments" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfDerivativeInstruments"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfEffectOfDerivativeInstrumentsInStatementOfOperationsRecognized" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEffectOfDerivativeInstrumentsInStatementOfOperationsRecognized"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureLongTermDebt" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureLongTermDebt"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfPrincipalPaymentsOfDebt" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfPrincipalPaymentsOfDebt"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureDebtAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureDebtAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureComponentsOfConvertibleSeniorNotes" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureComponentsOfConvertibleSeniorNotes"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureAccumulatedOtherComprehensiveIncome" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureAccumulatedOtherComprehensiveIncomeParenthetical" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureGoodwillAndIntangibleAssetsAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureChangesInCarryingAmountOfGoodwillByReportingUnits" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureChangesInCarryingAmountOfGoodwillByReportingUnits"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfAmortizableIntangibleAssets" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmortizableIntangibleAssets"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfEstimatedIntangibleAssetAmortizationExpense" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEstimatedIntangibleAssetAmortizationExpense"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureCommitmentsAndContingenciesAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureNonCancelableOperatingLeaseCommitments" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureNonCancelableOperatingLeaseCommitments"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureNetIncomePerCommonShare" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShare"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureNetIncomePerCommonShareParenthetical" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShareParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureNetIncomePerCommonShareAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShareAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureRestructuringAndOtherAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureRestructuringAndOtherAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfRestructuringAndOtherNet" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestructuringAndOtherNet"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfDefinedBenefitPensionAndPostretirementBenefitPlanAssetsAndObligations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfDefinedBenefitPensionAndPostretirementBenefitPlanAssetsAndObligations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureRetirementPlansAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureRetirementPlansAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfAmountsRecordedWithinStatementOfFinancialPosition" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmountsRecordedWithinStatementOfFinancialPosition"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfAmountsRecognizedInAccumulatedOtherComprehensiveLoss" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmountsRecognizedInAccumulatedOtherComprehensiveLoss"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfPensionPlansWithAccumulatedBenefitObligationAndProjectedBenefitObligationInExcessOfPlanAssets" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfPensionPlansWithAccumulatedBenefitObligationAndProjectedBenefitObligationInExcessOfPlanAssets"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfNetPeriodicPensionCosts" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfNetPeriodicPensionCosts"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfWeightedAverageAssumptionsToDetermineNetPeriodicPensionCost" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageAssumptionsToDetermineNetPeriodicPensionCost"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfWeightedAverageAssumptionsToDeterminePensionObligations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageAssumptionsToDeterminePensionObligations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfWeightedAveragePensionAssetAllocationsByCategory" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAveragePensionAssetAllocationsByCategory"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfTargetAssetAllocation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfTargetAssetAllocation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfFairValueOfPensionsPlanAssetsByAssetCategory" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfPensionsPlanAssetsByAssetCategory"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfExpectedFutureBenefitPayments" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfExpectedFutureBenefitPayments"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRates" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRates"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureStockBasedCompensationAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfStockCompensationPlanActivity" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockCompensationPlanActivity"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfShareBasedCompensationTotalSharesAvailable" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfShareBasedCompensationTotalSharesAvailable"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfWeightedAverageRestrictedStockUnitAwardDateFairValue" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageRestrictedStockUnitAwardDateFairValue"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfRestrictedStockUnitAwardsAggregateIntrinsicValue" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestrictedStockUnitAwardsAggregateIntrinsicValue"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfRestrictedStockUnitsWeightedAverageContractualTerms" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestrictedStockUnitsWeightedAverageContractualTerms"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfWeightedAverageStockOptionsExercisePrice" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageStockOptionsExercisePrice"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfStockOptionAggregateIntrinsicValueInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockOptionAggregateIntrinsicValueInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfStockOptionsWeightedAverageContractualTerms" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockOptionsWeightedAverageContractualTerms"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfSignificantOptionGroupsOutstanding" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSignificantOptionGroupsOutstanding"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureSavingsPlanAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureSavingsPlanAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfIncomeLossFromContinuingOperationsBeforeIncomeTaxes" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfIncomeLossFromContinuingOperationsBeforeIncomeTaxes"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfProvisionBenefitForIncomeTaxesFromContinuingOperations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfProvisionBenefitForIncomeTaxesFromContinuingOperations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureIncomeTaxesAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfTotalIncomeTaxProvisionBenefit" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfTotalIncomeTaxProvisionBenefit"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfComponentsOfDeferredTaxAssetsLiabilities" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfComponentsOfDeferredTaxAssetsLiabilities"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureSummaryOfOperatingLossCarryforwards" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureSummaryOfOperatingLossCarryforwards"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfReconciliationOfEffectiveTaxRate" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReconciliationOfEffectiveTaxRate"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfUnrecognizedTaxBenefits" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfUnrecognizedTaxBenefits"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfSegmentInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSegmentInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfSegmentReportingInformationBySegmentCharges" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSegmentReportingInformationBySegmentCharges"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfRevenueInDifferentGeographicalAreas" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRevenueInDifferentGeographicalAreas"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureOperatingSegmentGeographicAndSignificantCustomerInformationAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureOperatingSegmentGeographicAndSignificantCustomerInformationAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureScheduleOfLongLivedAssetsByGeographicArea" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfLongLivedAssetsByGeographicArea"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureStockRepurchaseProgramAdditionalInformation" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureStockRepurchaseProgramAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureStatementsOfOperations" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureStatementsOfOperations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureStatementsOfOperationsParenthetical" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureStatementsOfOperationsParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#DisclosureValuationAndQualifyingAccounts" roleURI="http://www.teradyne.com/taxonomy/role/DisclosureValuationAndQualifyingAccounts"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsNatureOfOperations" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsNatureOfOperations"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsChangeInAccountingPrincipleTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsChangeInAccountingPrincipleTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsChangeInAccountingPrincipleTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsChangeInAccountingPrincipleTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdopted" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdopted"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDebtDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDebtDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsEarningsPerShareTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsEarningsPerShareTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsDefinedContributionDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDefinedContributionDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsIncomeTaxDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsStockRepurchaseProgramTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsStockRepurchaseProgramTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="ter-20121231.xsd#Role_NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" roleURI="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock"/>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DocumentDocumentandEntityInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfFinancialPositionClassified">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="us-gaap_AccruedIncomeTaxesCurrent"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" xlink:label="us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredRevenueAndCustomerAdvancesCurrent" xlink:label="ter_DeferredRevenueAndCustomerAdvancesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="us-gaap_DeferredRevenueNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="us-gaap_DeferredTaxAssetsNetCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_AssetsCurrent" order="1.1000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_MarketableSecuritiesNoncurrent" order="1.1200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_OtherAssetsNoncurrent" order="1.1300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" order="1.1400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill" order="1.1500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Goodwill" order="1.1600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_MarketableSecuritiesCurrent" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_InventoryNet" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_DeferredTaxAssetsNetCurrent" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryRawMaterials" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryWorkInProcess" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryFinishedGoods" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_LiabilitiesCurrent" order="1.2400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DeferredRevenueNoncurrent" order="1.2500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" order="1.2600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DeferredTaxLiabilitiesNoncurrent" order="1.2700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_OtherAccruedLiabilitiesNoncurrent" order="1.2800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_LongTermDebtNoncurrent" order="1.2900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities" order="1.3000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_StockholdersEquity" order="1.3500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableCurrent" order="1.1700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent" order="1.1800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="ter_DeferredRevenueAndCustomerAdvancesCurrent" order="1.1900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" order="1.2000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent" order="1.2100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_AccruedIncomeTaxesCurrent" order="1.2200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_DebtCurrent" order="1.2300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_CommonStockValue" order="1.3100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_AdditionalPaidInCapital" order="1.3200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" order="1.3300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" order="1.3400" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfIncome">
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="us-gaap_SalesRevenueGoodsNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SalesRevenueServicesNet" xlink:label="us-gaap_SalesRevenueServicesNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfGoodsSold" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfServices" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_Revenues" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_CostOfRevenue" order="1.0600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" order="1.1600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_IncomeTaxExpenseBenefit" order="1.1700" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_OperatingIncomeLoss" order="1.1300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_InvestmentIncomeInterest" order="1.1400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_InterestExpense" order="1.1500" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:to="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" order="1.1900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:to="us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" order="1.2000" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_IncomeLossFromContinuingOperations" order="1.1800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" order="1.2100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" order="1.2200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_AmortizationOfIntangibleAssets" order="1.1000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_RestructuringSettlementAndImpairmentProvisions" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_GrossProfit" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingExpenses" order="1.1200" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_SalesRevenueGoodsNet" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_SalesRevenueServicesNet" order="1.0200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfIncomeParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfOtherComprehensiveIncome">
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_NetIncomeLoss" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTax" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" order="1.0800" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax" order="1.0700" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncomeParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/StatementOfCashFlowsIndirect">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentForAmortization" xlink:label="us-gaap_AdjustmentForAmortization"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashExpense" xlink:label="us-gaap_OtherNoncashExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="us-gaap_OtherNoncashIncomeExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:label="us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PaymentOfContingentConsideration" xlink:label="ter_PaymentOfContingentConsideration"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities" order="1.2400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities" order="1.3400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities" order="1.4000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" order="1.3500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_RepaymentsOfLongTermDebt" order="1.3600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="ter_PaymentOfContingentConsideration" order="1.3700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" order="1.3800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock" order="1.3900" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" order="1.3200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations" order="1.3300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" order="1.2500" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_PaymentsToAcquireAvailableForSaleSecurities" order="1.2600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" order="1.2700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" order="1.2800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_ProceedsFromSaleOfOtherInvestments" order="1.2900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_ProceedsFromLifeInsurancePolicies" order="1.3000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" order="1.3100" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" order="1.2200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" order="1.2300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncomeLossFromContinuingOperations" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_Depreciation" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_AdjustmentForAmortization" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_InventoryWriteDown" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_ShareBasedCompensation" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_OtherNoncashExpense" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_DefinedBenefitPlanActuarialGainLoss" order="1.1000" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_OtherOperatingActivitiesCashFlowStatement" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_TaxBenefitFromStockOptionsExercised1" order="1.1200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit" order="1.1300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_OtherNoncashIncomeExpense" order="1.1400" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable" order="1.1500" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInInventories" order="1.1600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" order="1.1700" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" order="1.1800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" order="1.1900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" order="1.2000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" order="1.2100" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureDeferredRevenueAndCustomerAdvances">
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredRevenueAndCustomerAdvancesAcceptance" xlink:label="ter_DeferredRevenueAndCustomerAdvancesAcceptance"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredRevenueAndCustomerAdvancesUndeliveredElements" xlink:label="ter_DeferredRevenueAndCustomerAdvancesUndeliveredElements"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_MaintenanceTrainingAndExtendedWarranty" xlink:label="ter_MaintenanceTrainingAndExtendedWarranty"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalDeferredRevenueAndCustomerAdvances" xlink:label="ter_TotalDeferredRevenueAndCustomerAdvances"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalDeferredRevenueAndCustomerAdvances" xlink:to="us-gaap_CustomerAdvancesAndDeposits" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalDeferredRevenueAndCustomerAdvances" xlink:to="ter_MaintenanceTrainingAndExtendedWarranty" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalDeferredRevenueAndCustomerAdvances" xlink:to="ter_DeferredRevenueAndCustomerAdvancesUndeliveredElements" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalDeferredRevenueAndCustomerAdvances" xlink:to="ter_DeferredRevenueAndCustomerAdvancesAcceptance" order="1.0400" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureOtherAccruedLiabilities">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureUsefulLivesOfAssets">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureStockBasedCompensation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureBlackScholesOptionPricingModel">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEstimatedFairValueOfStockOptionsAssumptions">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureChangeInAccountingPrincipleAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedBalanceSheets">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfOperations">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfOperationsParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncome">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" order="1.0900" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax" order="1.0400" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" order="1.0700" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax" order="1.0800" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCondensedConsolidatedStatementsOfCashFlows">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentForAmortization" xlink:label="us-gaap_AdjustmentForAmortization"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashExpense" xlink:label="us-gaap_OtherNoncashExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="us-gaap_OtherNoncashIncomeExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_NetIncomeLoss" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncomeLossFromContinuingOperations" order="1.0400" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_Depreciation" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_AdjustmentForAmortization" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_ShareBasedCompensation" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_InventoryWriteDown" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_OtherNoncashExpense" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_DefinedBenefitPlanActuarialGainLoss" order="1.1000" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_OtherNoncashIncomeExpense" order="1.1200" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable" order="1.1300" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInInventories" order="1.1400" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssets" order="1.1500" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" order="1.1600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" order="1.1700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" order="1.1800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" order="1.1900" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureDiscontinuedOperationsAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureDiscontinuedOperations">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureAcquisitionsAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfStockOptionsEstimatedUsingWeightedAverageAssumptions">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureAllocationOfPurchasePrice">
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities" xlink:label="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilitiesNoncurrent" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilitiesNoncurrent"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsNotAmortizable" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsNotAmortizable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentAssets" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities" xlink:label="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsNotAmortizable" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="ter_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashCashEquivalentsAndShortTermMarketableSecurities" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentAssets" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable" order="1.0600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilitiesNoncurrent" order="1.0700" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice" xlink:to="us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities" order="1.0800" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureComponentsOfOtherIntangibleAssetsAndEstimatedUsefulLives">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureProFormaResultsUnderAcquisitions">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosurePropertyPlantAndEquipment">
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="us-gaap_BuildingsAndImprovementsGross"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FurnitureAndFixturesGross" xlink:label="us-gaap_FurnitureAndFixturesGross"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_Land" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_BuildingsAndImprovementsGross" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_MachineryAndEquipmentGross" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_FurnitureAndFixturesGross" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_LeaseholdImprovementsGross" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_ConstructionInProgressGross" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentGross" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" order="1.0800" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureFinancialInstrumentsAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfFinancialAssetsAndLiabilitiesMeasuredOnRecurringBasis">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" xlink:label="us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_DerivativeLiabilities" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" order="1.0200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReportedFinancialAssetsAndLiabilities">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfChangesInFairValueOfLevelThreeContingentConsideration">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfCarryingAmountsAndFairValuesOfFinancialInstrument">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAvailableForSaleMarketableSecurities">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="us-gaap_AvailableForSaleSecuritiesAmortizedCost"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:label="us-gaap_AvailableForSaleSecuritiesFairValueDisclosure"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain" xlink:label="us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1" xlink:label="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:to="us-gaap_AvailableForSaleSecuritiesAmortizedCost" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:to="us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AvailableForSaleSecuritiesFairValueDisclosure" xlink:to="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1" order="1.0300" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReportedAvailableForSaleMarketableSecurities">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureContractualMaturitiesOfAvailableForSaleMarketableSecurities">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfNotionalAmountOfDerivatives">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfDerivativeInstruments">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEffectOfDerivativeInstrumentsInStatementOfOperationsRecognized">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureLongTermDebt">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfPrincipalPaymentsOfDebt">
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:label="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="ter_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter" order="1.0600" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureDebtAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureComponentsOfConvertibleSeniorNotes">
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_ContractualInterestExpenseOnCoupon" xlink:label="ter_ContractualInterestExpenseOnCoupon"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ConvertibleDebt" xlink:to="us-gaap_DebtInstrumentFaceAmount" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ConvertibleDebt" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount" order="1.0200" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DebtInstrumentConvertibleInterestExpense" xlink:to="ter_ContractualInterestExpenseOnCoupon" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DebtInstrumentConvertibleInterestExpense" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium" order="1.0400" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncome">
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax" order="1.0100" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax" order="1.0200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureChangesInCarryingAmountOfGoodwillByReportingUnits">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillGross" xlink:label="us-gaap_GoodwillGross"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_GoodwillGross" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" order="1.0200" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmortizableIntangibleAssets">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfEstimatedIntangibleAssetAmortizationExpense">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureNonCancelableOperatingLeaseCommitments">
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" order="1.0600" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShare">
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IncomeImpactOfAssumedConversionOfConvertibleNotes" xlink:label="ter_IncomeImpactOfAssumedConversionOfConvertibleNotes"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_IncrementalCommonSharesAttributableToConversionOfStockOption" xlink:label="ter_IncrementalCommonSharesAttributableToConversionOfStockOption"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" order="1.1300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" order="1.1400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" order="1.1500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" order="1.1600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLossAttributableToParentDiluted" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLossAttributableToParentDiluted" xlink:to="ter_IncomeImpactOfAssumedConversionOfConvertibleNotes" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_IncomeLossFromContinuingOperations" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="ter_IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="ter_IncrementalCommonSharesAttributableToConversionOfStockOption" order="1.1000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" order="1.1200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShareParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureNetIncomePerCommonShareAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureRestructuringAndOtherAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestructuringAndOtherNet">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfDefinedBenefitPensionAndPostretirementBenefitPlanAssetsAndObligations">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureRetirementPlansAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmountsRecordedWithinStatementOfFinancialPosition">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsCurrentAndNoncurrent" xlink:label="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsCurrentAndNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" xlink:label="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent"/>
    <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"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsCurrentAndNoncurrent" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="ter_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" order="1.0200" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" order="1.0300" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfAmountsRecognizedInAccumulatedOtherComprehensiveLoss">
    <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"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax" order="1.0300" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfPensionPlansWithAccumulatedBenefitObligationAndProjectedBenefitObligationInExcessOfPlanAssets">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfNetPeriodicPensionCosts">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCreditArisingDuringPeriod" xlink:label="ter_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCreditArisingDuringPeriod"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="us-gaap_DefinedBenefitPlanInterestCost"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DefinedBenefitPlanRecognizedInNetPeriodicPensionCostAndOtherComprehensiveIncomeTotal" xlink:label="ter_DefinedBenefitPlanRecognizedInNetPeriodicPensionCostAndOtherComprehensiveIncomeTotal"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="us-gaap_DefinedBenefitPlanServiceCost"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanServiceCost" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanInterestCost" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" order="1.0300" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit" order="1.0400" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" order="1.0500" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" order="1.0600" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_DefinedBenefitPlanRecognizedInNetPeriodicPensionCostAndOtherComprehensiveIncomeTotal" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_DefinedBenefitPlanRecognizedInNetPeriodicPensionCostAndOtherComprehensiveIncomeTotal" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" order="1.1000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:to="ter_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCreditArisingDuringPeriod" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:to="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" order="1.0900" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageAssumptionsToDetermineNetPeriodicPensionCost">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageAssumptionsToDeterminePensionObligations">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAveragePensionAssetAllocationsByCategory">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfTargetAssetAllocation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfFairValueOfPensionsPlanAssetsByAssetCategory">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfExpectedFutureBenefitPayments">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRates">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockCompensationPlanActivity">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfShareBasedCompensationTotalSharesAvailable">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageRestrictedStockUnitAwardDateFairValue">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestrictedStockUnitAwardsAggregateIntrinsicValue">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRestrictedStockUnitsWeightedAverageContractualTerms">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfWeightedAverageStockOptionsExercisePrice">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockOptionAggregateIntrinsicValueInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfStockOptionsWeightedAverageContractualTerms">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSignificantOptionGroupsOutstanding">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureSavingsPlanAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfIncomeLossFromContinuingOperationsBeforeIncomeTaxes">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" order="1.0200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfProvisionBenefitForIncomeTaxesFromContinuingOperations">
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <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"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:label="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperations" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperations"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:to="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:to="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" xlink:to="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeTaxExpenseBenefitContinuingOperations" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeTaxExpenseBenefitContinuingOperations" xlink:to="ter_DeferredIncomeTaxExpenseBenefitNetOfAdjustments" order="1.0800" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfTotalIncomeTaxProvisionBenefit">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperations" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations" xlink:label="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations" xlink:to="us-gaap_IncomeTaxExpenseBenefitContinuingOperations" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ter_TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations" xlink:to="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" order="1.0200" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfComponentsOfDeferredTaxAssetsLiabilities">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="us-gaap_DeferredTaxAssetsGross"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment" xlink:label="us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsInventory" xlink:label="us-gaap_DeferredTaxAssetsInventory"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="us-gaap_DeferredTaxAssetsNet"/>
    <loc xlink:type="locator" xlink:href="ter-20121231.xsd#ter_DeferredTaxAssetsNetOperatingAndCapitalLossCarryforwards" xlink:label="ter_DeferredTaxAssetsNetOperatingAndCapitalLossCarryforwards"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="us-gaap_DeferredTaxAssetsOther"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="us-gaap_DeferredTaxLiabilities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesInvestments" xlink:label="us-gaap_DeferredTaxLiabilitiesInvestments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="ter_DeferredTaxAssetsNetOperatingAndCapitalLossCarryforwards" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsInventory" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" order="1.0600" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" order="1.0700" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences" order="1.0800" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsOther" order="1.0900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsDeferredIncome" order="1.1000" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxAssetsNet" order="1.1300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxLiabilities" order="1.1700" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsGross" order="1.1100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance" order="1.1200" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxLiabilities" xlink:to="us-gaap_DeferredTaxLiabilitiesInvestments" order="1.1400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxLiabilities" xlink:to="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" order="1.1500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxLiabilities" xlink:to="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" order="1.1600" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureSummaryOfOperatingLossCarryforwards">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfReconciliationOfEffectiveTaxRate">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" order="1.0100" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" order="1.0200" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" order="1.0300" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" order="1.0400" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther" order="1.0500" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" order="1.0600" weight="1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfUnrecognizedTaxBenefits">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSegmentInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfSegmentReportingInformationBySegmentCharges">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfRevenueInDifferentGeographicalAreas">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureOperatingSegmentGeographicAndSignificantCustomerInformationAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureScheduleOfLongLivedAssetsByGeographicArea">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureStockRepurchaseProgramAdditionalInformation">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureStatementsOfOperations">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:to="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" order="1.1900" weight="1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:to="us-gaap_IncomeTaxExpenseBenefit" order="1.2000" weight="-1.00" priority="2" use="optional"/>
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:to="us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" order="1.2100" weight="-1.00" priority="2" use="optional"/>
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureStatementsOfOperationsParenthetical">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/DisclosureValuationAndQualifyingAccounts">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsNatureOfOperations">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsChangeInAccountingPrincipleTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsChangeInAccountingPrincipleTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdopted">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsGoodwillAndIntangibleAssetsDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsDefinedContributionDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsStockRepurchaseProgramTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.teradyne.com/taxonomy/role/NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock">
  </calculationLink>
</linkbase>
