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<!--Created on: 3/8/2017 1:21:34 PM-->
<!--Modified on: 3/8/2017 1:21:34 PM-->
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  <xsd:element name="BondIssueCostsMember" id="nsys_BondIssueCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExcessCashBalancesNumberOfHighCreditQualityFinancialInstitution" id="nsys_ExcessCashBalancesNumberOfHighCreditQualityFinancialInstitution" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDebtInstrumentsTable" id="nsys_ScheduleOfDebtInstrumentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RealEstateTermNoteMember" id="nsys_RealEstateTermNoteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="UnrecognizedTaxBenefitsAbstract" id="nsys_UnrecognizedTaxBenefitsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="nsys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriod" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriodWeightedAverageExercisePrice" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="ScheduleOfPropertyPlantAndEquipmentAtCarryingValueTableTextBlock" id="nsys_ScheduleOfPropertyPlantAndEquipmentAtCarryingValueTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" id="nsys_ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BuildingAndLeaseholdImprovementsMember" id="nsys_BuildingAndLeaseholdImprovementsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OfficeAndOtherEquipmentMember" id="nsys_OfficeAndOtherEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AerospaceAndDefenseMember" id="nsys_AerospaceAndDefenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MedicalMember" id="nsys_MedicalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IndustrialMember" id="nsys_IndustrialMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConcentrationRiskNumberOfDivisions" id="nsys_ConcentrationRiskNumberOfDivisions" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquipmentNotesMaturingInMay2015Member" id="nsys_EquipmentNotesMaturingInMay2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="nsys_DeferredTaxAssetsNonCompeteAmortization" name="DeferredTaxAssetsNonCompeteAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="DefinedContributionPlanEligibilityServicePeriod" id="nsys_DefinedContributionPlanEligibilityServicePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanEligibilityAgeOfEmployee" id="nsys_DefinedContributionPlanEligibilityAgeOfEmployee" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockOptionPlan2003Member" id="nsys_StockOptionPlan2003Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncentiveCompensationPlan2005Member" id="nsys_IncentiveCompensationPlan2005Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityAppreciationRightsPlanMember" id="nsys_EquityAppreciationRightsPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssued" id="nsys_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesEliminated" id="nsys_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesEliminated" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisableTerm" id="nsys_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisableTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationTerm" id="nsys_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommitmentTable" id="nsys_CommitmentTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommitmentLineItems" id="nsys_CommitmentLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="nsys_BonusToBePaidAsPercentageOfParticipantsBaseAnnualSalary" name="BonusToBePaidAsPercentageOfParticipantsBaseAnnualSalary" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="GradedVestingSchedulePeriod" id="nsys_GradedVestingSchedulePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AnnualVestingPercentage" id="nsys_AnnualVestingPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DisabilityAndLifeInsurancePlansPeriod" id="nsys_DisabilityAndLifeInsurancePlansPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ProfessionalOutplacementServicesWouldBeReceivedAmount" id="nsys_ProfessionalOutplacementServicesWouldBeReceivedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PropertyPlantAndEquipmentAndAssetsHeldForSalePolicyTextBlock" id="nsys_PropertyPlantAndEquipmentAndAssetsHeldForSalePolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanEmployerMatchingContributionRate" id="nsys_DefinedContributionPlanEmployerMatchingContributionRate" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LargestCustomerMember" id="nsys_LargestCustomerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DivisionOneOfLargestCustomerMember" id="nsys_DivisionOneOfLargestCustomerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DivisionTwoOfLargestCustomerMember" id="nsys_DivisionTwoOfLargestCustomerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RealEstateTermNotesMaturingInMay2027AndDecember2017Member" id="nsys_RealEstateTermNotesMaturingInMay2027AndDecember2017Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="nsys_DevicixLlcMember" name="DevicixLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationEarnoutPayablePeriodUponCompletionOfMeasurementPeriod" name="BusinessCombinationEarnoutPayablePeriodUponCompletionOfMeasurementPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NumberOfTwelveMonthMeasurementPeriods" name="NumberOfTwelveMonthMeasurementPeriods" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationEarnoutRevenueBase" name="BusinessCombinationEarnoutRevenueBase" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationEarnoutPercentageProductionRevenue" name="BusinessCombinationEarnoutPercentageProductionRevenue" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationEarnoutPercentageEngineeringRevenues" name="BusinessCombinationEarnoutPercentageEngineeringRevenues" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NumberOfPromissoryNotes" name="NumberOfPromissoryNotes" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationMeasurementPeriodForEarnout" name="BusinessCombinationMeasurementPeriodForEarnout" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_RestrictedStockExpenseIncome" name="RestrictedStockExpenseIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NotePayableSubjectToOffsetsMember" name="NotePayableSubjectToOffsetsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NotePayableNotSubjectToOffsetsMember" name="NotePayableNotSubjectToOffsetsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_DevicixAcqNoteOneSubordinateDebtDueJuly12019Member" name="DevicixAcqNoteOneSubordinateDebtDueJuly12019Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_DevicixAcqNoteTwoSubordinateDebtDueJuly12019Member" name="DevicixAcqNoteTwoSubordinateDebtDueJuly12019Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_DiscountOnNotesPayable" name="DiscountOnNotesPayable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedcurrentassetsaccountsreceivablesduetoseller" name="Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedcurrentassetsaccountsreceivablesduetoseller" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedcurrentassetsprepaidexpenseandinventory" name="Businesscombinationrecognizedidentifiableassetsacquiredandliabilitiesassumedcurrentassetsprepaidexpenseandinventory" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesCustomerDeposits" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesCustomerDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansToSeller" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansToSeller" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessAcquisitionProformaEarningsPerShareBasicAndDilutedAbstract" name="BusinessAcquisitionProformaEarningsPerShareBasicAndDilutedAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessEnterpriseValue" name="BusinessEnterpriseValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesAbstract" name="NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_LineOfCreditMinimumFixedChargeCoverageRatioDuringPeriod" name="LineOfCreditMinimumFixedChargeCoverageRatioDuringPeriod" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_LineOfCreditMinimumFixedChargeCoverageRatioThereafter" name="LineOfCreditMinimumFixedChargeCoverageRatioThereafter" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_AllocatedShareBasedCompensationIncome" name="AllocatedShareBasedCompensationIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_ExcessTaxBenefitProvisionFromStockBasedCompensation" name="ExcessTaxBenefitProvisionFromStockBasedCompensation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationNotePayableSellerFinanced" name="BusinessCombinationNotePayableSellerFinanced" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_LongTermDebtIncludingDiscountsAndIssuanceCosts" name="LongTermDebtIncludingDiscountsAndIssuanceCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessAcquisitionProformaEarningsPerShareBasicAndDiluted" name="BusinessAcquisitionProformaEarningsPerShareBasicAndDiluted" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_AugustaMember" name="AugustaMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_NumberOfEmployeesAffected" name="NumberOfEmployeesAffected" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayRollBenefitsAndOtherCurrentLiabilities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayRollBenefitsAndOtherCurrentLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_EmployeeProfitSharing1993planMember" name="EmployeeProfitSharing1993planMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_ExecutiveBonusLifeInsurancePlan2002Member" name="ExecutiveBonusLifeInsurancePlan2002Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_ChangeOfControlAgreementsMember" name="ChangeOfControlAgreementsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_OtherParticipantsMember" name="OtherParticipantsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_AccumulatedForeignCurrencyTranslationLoss" name="AccumulatedForeignCurrencyTranslationLoss" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_DebtDisclosureAndSubsequentEventsDisclosureAbstract" name="DebtDisclosureAndSubsequentEventsDisclosureAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_DebtDisclosureAndSubsequentEventsDisclosureTextBlock" name="DebtDisclosureAndSubsequentEventsDisclosureTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_TenthAmendmentToThirdAmendedAndRestatedCreditAndSecurityAgreementMember" name="TenthAmendmentToThirdAmendedAndRestatedCreditAndSecurityAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BalanceAndActivityOfContingentConsiderationOnBusinessAcquisitionRollForward" name="BalanceAndActivityOfContingentConsiderationOnBusinessAcquisitionRollForward" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationContingentConsiderationInitialFairValue" name="BusinessCombinationContingentConsiderationInitialFairValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="nsys_BusinessCombinationContingentConsiderationPaid" name="BusinessCombinationContingentConsiderationPaid" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
