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    <element id="VTSI_GeographicDistributionCommercialMember" name="GeographicDistributionCommercialMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_SimulatorsAndAccessoriesMember" name="SimulatorsAndAccessoriesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_GeographicDistributionGovernmentMember" name="GeographicDistributionGovernmentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_ExtendedServicetypeWarrantiesMember" name="ExtendedServicetypeWarrantiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_CustomizedSoftwareAndContentMember" name="CustomizedSoftwareAndContentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_InstallationAndTrainingMember" name="InstallationAndTrainingMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DesignPrototypingMember" name="DesignPrototypingMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_SubscriptionTrainingEquipmentPartnershipMember" name="SubscriptionTrainingEquipmentPartnershipMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_CorporatesMember" name="CorporatesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_CorporatePurchasesMember" name="CorporatePurchasesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_CorporateAssetsMember" name="CorporateAssetsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_FurnitureAndOfficeEquipmentMember" name="FurnitureAndOfficeEquipmentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_SubscriptionTrainingEquipmentPartnershipEquipmentMember" name="SubscriptionTrainingEquipmentPartnershipEquipmentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_CapitalizedMediaContentMember" name="CapitalizedMediaContentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_AcquiredLeaseIntangibleAssetsMember" name="AcquiredLeaseIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_OfficeAndIndustrialSpaceMember" name="OfficeAndIndustrialSpaceMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_UnaffiliatedThirdPartyMember" name="UnaffiliatedThirdPartyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_PropertyMember" name="PropertyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_ArizonaBankAndTrustMember" name="ArizonaBankAndTrustMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_OneHundredAndNineteenRegularMonthlyPaymentsMember" name="OneHundredAndNineteenRegularMonthlyPaymentsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_OneIrregularPaymentMember" name="OneIrregularPaymentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_LossOnDisposalOfPPE" name="LossOnDisposalOfPPE" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_IncreaseDecreaseInDeferredContractCostsNoncurrent" name="IncreaseDecreaseInDeferredContractCostsNoncurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_IncreaseDecreaseInUnbilledRevenue" name="IncreaseDecreaseInUnbilledRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_IncreaseDecreaseInOperatingLeaseRightOfUseLiability" name="IncreaseDecreaseInOperatingLeaseRightOfUseLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DisclosureDeferredContractCostsAbstract" name="DisclosureDeferredContractCostsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DeferredContractCostsDisclosureTextBlock" name="DeferredContractCostsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DisclosureLeasesAbstract" name="DisclosureLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_OrganizationAndBusinessOperationsPolicyTextBlock" name="OrganizationAndBusinessOperationsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DisaggregationOfRevenuePolicyTextBlock" name="DisaggregationOfRevenuePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_StepRevenuePolicyTextBlock" name="StepRevenuePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_ScheduleOfBalanceSheetClassificationOfLeaseAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfBalanceSheetClassificationOfLeaseAssetsAndLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_AccountingPoliciesTable" name="AccountingPoliciesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="VTSI_StockIssuedDuringPeriodValueStockReservedForFutureServices" name="StockIssuedDuringPeriodValueStockReservedForFutureServices" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_NumberOfReportableSegmentsNotDisclosedFlag" name="NumberOfReportableSegmentsNotDisclosedFlag" nillable="true" xbrli:periodType="duration" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DeferredContractCostsShortTerm" name="DeferredContractCostsShortTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DeferredContractCostsLongTermAdjustment" name="DeferredContractCostsLongTermAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_AnnualExpenseCurrent" name="AnnualExpenseCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DeferredContractCostsLongTerm" name="DeferredContractCostsLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_DeferredContractCostsShortTermAdjustment" name="DeferredContractCostsShortTermAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_AnnualExpense" name="AnnualExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="VTSI_BorrowingRate" name="BorrowingRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
</schema>
