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  <xsd:element abstract="true" id="ins_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_NumberOfInvesteeCompanies" name="NumberOfInvesteeCompanies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_NumberOfOptionsEachDirectorReceivedAtEachAnnualMeeting" name="NumberOfOptionsEachDirectorReceivedAtEachAnnualMeeting" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ins_OperatingLossCarryforwardExpiringIn2021Member" name="OperatingLossCarryforwardExpiringIn2021Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OperatingLossCarryforwardExpiringIn2022Member" name="OperatingLossCarryforwardExpiringIn2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OperatingLossCarryforwardExpiringIn2030Member" name="OperatingLossCarryforwardExpiringIn2030Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OperatingLossCarryforwardExpiringIn2031Member" name="OperatingLossCarryforwardExpiringIn2031Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OperatingLossCarryforwardExpiringThereafterMember" name="OperatingLossCarryforwardExpiringThereafterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionAgreementAxis" name="OptionAgreementAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionAgreementDomain" name="OptionAgreementDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionExpenseMember" name="OptionExpenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsExercisableExercisePriceRange1Member" name="OptionsExercisableExercisePriceRange1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsExercisableExercisePriceRange2Member" name="OptionsExercisableExercisePriceRange2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsExercisableExercisePriceRange3Member" name="OptionsExercisableExercisePriceRange3Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsOutstandingExercisePriceRange1Member" name="OptionsOutstandingExercisePriceRange1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsOutstandingExercisePriceRange2Member" name="OptionsOutstandingExercisePriceRange2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_OptionsOutstandingExercisePriceRange3Member" name="OptionsOutstandingExercisePriceRange3Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_OptionsVestingPercentageOnFirstAndSecondAnniversary" name="OptionsVestingPercentageOnFirstAndSecondAnniversary" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ins_OtherCountriesMember" name="OtherCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_OtherNoncashIncomeDiscontinuedOperations" name="OtherNoncashIncomeDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ins_OtherNoncashIncomeInvestmentAndInterestIncomeNet" name="OtherNoncashIncomeInvestmentAndInterestIncomeNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ins_PercentageOfConsolidatedRevenue" name="PercentageOfConsolidatedRevenue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_PriorToTheirAcquisitionByTheCompanyMember" name="PriorToTheirAcquisitionByTheCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_PrivatelyHeldTechnologyCompanyMember" name="PrivatelyHeldTechnologyCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_RelatedPartyOwnershipPercentage" name="RelatedPartyOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ins_RestrictedCashAndCashEquivalentsAfterWorkingCapitalAdjustmentMember" name="RestrictedCashAndCashEquivalentsAfterWorkingCapitalAdjustmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ins_RetirementPlanLumpSumCashPaymentAccrual" name="RetirementPlanLumpSumCashPaymentAccrual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="ins_RetirementPlanLumpSumCashPaymentMaximum" name="RetirementPlanLumpSumCashPaymentMaximum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="ins_RetirementPlanLumpSumCashPaymentPerYear" name="RetirementPlanLumpSumCashPaymentPerYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="ins_RetirementPlanMinimumAge" name="RetirementPlanMinimumAge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="ins_SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfOptionsUngranted" name="SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfOptionsUngranted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="ins_SpecialStockSharesAuthorized" name="SpecialStockSharesAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="ins_SpecialStockSharesOutstanding" name="SpecialStockSharesOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="ins_StockRepurchasedAndRetiredDuringPeriodPricePerShare" name="StockRepurchasedAndRetiredDuringPeriodPricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_The2003PlanMember" name="The2003PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_The2011NonemployeeDirectorStockOptionPlanMember" name="The2011NonemployeeDirectorStockOptionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_The2015PlanMember" name="The2015PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_TheDirectorsPlanMember" name="TheDirectorsPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_UnitedStatesMember" name="UnitedStatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_UsefulLivesMember" name="UsefulLivesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-components-details" name="statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-components-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-useful-lives-details" name="statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-property-and-equipment-useful-lives-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-stockbased-compensation-weighted-average-assumptions-details" name="statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-stockbased-compensation-weighted-average-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-tables" name="statement-statement-note-1-organization-and-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-13-stock-option-plans-stock-option-activity-details" name="statement-statement-note-13-stock-option-plans-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-13-stock-option-plans-stock-options-exercisable-details" name="statement-statement-note-13-stock-option-plans-stock-options-exercisable-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-13-stock-option-plans-stock-options-outstanding-details" name="statement-statement-note-13-stock-option-plans-stock-options-outstanding-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-13-stock-option-plans-tables" name="statement-statement-note-13-stock-option-plans-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-14-foreign-revenues-and-operations-foreign-revenues-details" name="statement-statement-note-14-foreign-revenues-and-operations-foreign-revenues-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-14-foreign-revenues-and-operations-tables" name="statement-statement-note-14-foreign-revenues-and-operations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-16-net-income-loss-per-share-reconciliation-of-basic-and-diluted-income-per-share-details" name="statement-statement-note-16-net-income-loss-per-share-reconciliation-of-basic-and-diluted-income-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-16-net-income-loss-per-share-tables" name="statement-statement-note-16-net-income-loss-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-2-discontinued-operations-condensed-financial-information-details" name="statement-statement-note-2-discontinued-operations-condensed-financial-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-2-discontinued-operations-tables" name="statement-statement-note-2-discontinued-operations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-4-investments-nkd-enterprises-llc-details" name="statement-statement-note-4-investments-nkd-enterprises-llc-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-4-investments-tables" name="statement-statement-note-4-investments-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-4-investments-unaudited-summarized-financial-information-for-nkd-enterprises-llc-operations-details" name="statement-statement-note-4-investments-unaudited-summarized-financial-information-for-nkd-enterprises-llc-operations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-5-accounts-receivable-and-customer-concentrations-concentration-of-revenue-details" name="statement-statement-note-5-accounts-receivable-and-customer-concentrations-concentration-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-5-accounts-receivable-and-customer-concentrations-tables" name="statement-statement-note-5-accounts-receivable-and-customer-concentrations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-6-shortterm-borrowings-credit-facility-terms-and-borrowings-details" name="statement-statement-note-6-shortterm-borrowings-credit-facility-terms-and-borrowings-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-6-shortterm-borrowings-tables" name="statement-statement-note-6-shortterm-borrowings-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-7-income-taxes-income-tax-provision-from-continuing-operations-details" name="statement-statement-note-7-income-taxes-income-tax-provision-from-continuing-operations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-7-income-taxes-net-deferred-tax-assets-details" name="statement-statement-note-7-income-taxes-net-deferred-tax-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-7-income-taxes-net-operating-loss-carryforwards-details" name="statement-statement-note-7-income-taxes-net-operating-loss-carryforwards-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-7-income-taxes-reconciliation-of-income-taxes-rates-details" name="statement-statement-note-7-income-taxes-reconciliation-of-income-taxes-rates-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-7-income-taxes-tables" name="statement-statement-note-7-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-8-commitments-and-contingencies-future-minimum-lease-payments-details" name="statement-statement-note-8-commitments-and-contingencies-future-minimum-lease-payments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-note-8-commitments-and-contingencies-tables" name="statement-statement-note-8-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ins_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
