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  <xsd:element id="osis_ScheduleOfBalanceSheetAccountsTableTextBlock" name="ScheduleOfBalanceSheetAccountsTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfComponentsOfCurrentTaxesReceivableAndPayableAndPrepaidTaxesTableTextBlock" id="osis_ScheduleOfComponentsOfCurrentTaxesReceivableAndPayableAndPrepaidTaxesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="osis_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock" name="ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" id="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="osis_SecurityDivisionMember" name="SecurityDivisionMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreasedForEachAwardForfeitedAndReturned" id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreasedForEachAwardForfeitedAndReturned" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantReducedForEachAwardGranted" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantReducedForEachAwardGranted" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract" id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedEmployeeCompensationPlansMember" id="osis_ShareBasedEmployeeCompensationPlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="osis_BusinessCombinationContingentConsiderationLiabilityPayment" name="BusinessCombinationContingentConsiderationLiabilityPayment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_ConcentrationRiskNumberOfCustomer" name="ConcentrationRiskNumberOfCustomer" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ScheduleOfImpairmentRestructuringAndRelatedCostsTableTextBlock" name="ScheduleOfImpairmentRestructuringAndRelatedCostsTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_CashAndCashEquivalentsConcentrationRiskMember" name="CashAndCashEquivalentsConcentrationRiskMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_DefinedContributionPlanMaximumContributionsFromBonusPerEmployeePercent" name="DefinedContributionPlanMaximumContributionsFromBonusPerEmployeePercent" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ChargesRelatedToLitigationMember" name="ChargesRelatedToLitigationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_PeriodToClassifyLiabilitiesUnderFundedPlansAsNoncurrent" name="PeriodToClassifyLiabilitiesUnderFundedPlansAsNoncurrent" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_InterestAndOtherExpenseNet" name="InterestAndOtherExpenseNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_RevenueRemainingPerformanceObligationExpectedTimingPercentage" name="RevenueRemainingPerformanceObligationExpectedTimingPercentage" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="osis_ContractWithCustomerLiabilityPercentageOfChangeCustomerDepositsAndPrepayments" name="ContractWithCustomerLiabilityPercentageOfChangeCustomerDepositsAndPrepayments" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueCurrent" name="ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueCurrent" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ContractWithCustomerAssetAmountOfChange" name="ContractWithCustomerAssetAmountOfChange" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="osis_ContractWithCustomerAssetPercentageOfChange" name="ContractWithCustomerAssetPercentageOfChange" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments" name="ContractWithCustomerLiabilityCustomerDepositsAndPrepayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="osis_CombinedMember" name="CombinedMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficersCompensationPercent" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficersCompensationPercent" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_ScheduleOfSupplementalBalanceSheetAssetsAndLiabilitiesRelatedToOperatingLeasesTableTextBlock" name="ScheduleOfSupplementalBalanceSheetAssetsAndLiabilitiesRelatedToOperatingLeasesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ScheduleOfSupplementalCashFlowInformationForOperatingLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationForOperatingLeasesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_BusinessCombinationIncreaseDecreaseInForeignCurrencyTranslation" name="BusinessCombinationIncreaseDecreaseInForeignCurrencyTranslation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="osis_PaymentsForRestructuringNetReimbursement" name="PaymentsForRestructuringNetReimbursement" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="osis_RestructuringAndOtherChargesBenefitNet" name="RestructuringAndOtherChargesBenefitNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable" name="ScheduleOfImpairmentRestructuringAndOtherChargesTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_DeferredTaxAssetsOperatingLeaseLiabilities" name="DeferredTaxAssetsOperatingLeaseLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="osis_TaxCutsAndJobsActTransitionTaxForOperatingLeaseRouAssets" name="TaxCutsAndJobsActTransitionTaxForOperatingLeaseRouAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="osis_IncreaseDecreaseInDeferredRevenueCurrent" name="IncreaseDecreaseInDeferredRevenueCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_IncreaseDecreaseInDeferredRevenueNoncurrent" name="IncreaseDecreaseInDeferredRevenueNoncurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_IncreaseDecreaseContractWithCustomerLiabilityCustomerDepositsAndPrepayments" name="IncreaseDecreaseContractWithCustomerLiabilityCustomerDepositsAndPrepayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_FreightPolicyPolicyTextBlock" name="FreightPolicyPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ProceedsFromMaturitiesOfCertificatesOfDeposit" name="ProceedsFromMaturitiesOfCertificatesOfDeposit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="osis_OtherOperationalEfficiencyActivitiesMember" name="OtherOperationalEfficiencyActivitiesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_RevenueRecognizedFromContractLiabilities" name="RevenueRecognizedFromContractLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="osis_LettersOfCreditSubFacilityMember" name="LettersOfCreditSubFacilityMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="osis_ScheduleOfComponentsOfNetDeferredIncomeTaxLiabilityTableTextBlock" name="ScheduleOfComponentsOfNetDeferredIncomeTaxLiabilityTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueNonCurrent" name="ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueNonCurrent" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="osis_TermLoanMember" name="TermLoanMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CommitmentsAndContingenciesDisclosureTable" id="osis_CommitmentsAndContingenciesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReclassificationOfAccumulatedOtherComprehensiveLossToInterestExpenses" id="osis_ReclassificationOfAccumulatedOtherComprehensiveLossToInterestExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SummaryOfSignificantAccountingPoliciesTable" id="osis_SummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SummaryOfSignificantAccountingPoliciesLineItems" id="osis_SummaryOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanAssetsForPlanBenefitsCurrent" id="osis_DefinedBenefitPlanAssetsForPlanBenefitsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationPatentBoxBenefitPercent" id="osis_EffectiveIncomeTaxRateReconciliationPatentBoxBenefitPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConsolidationAbstract" id="osis_ConsolidationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PrivatelyHeldProviderOfRadiationTechnologyMember" id="osis_PrivatelyHeldProviderOfRadiationTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PrivatelyHeldContractManufacturingBusinessMember" id="osis_PrivatelyHeldContractManufacturingBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="Rule10b51ArrangementModifiedFlag" id="osis_Rule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NonRule10b51ArrangementModifiedFlag" id="osis_NonRule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EcilRapiscanSecurityProductsLimitedMember" id="osis_EcilRapiscanSecurityProductsLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CollectiveVotingPowerControllingInterestPercentage" id="osis_CollectiveVotingPowerControllingInterestPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ConvertibleSeniorNotesDue2029Member" id="osis_ConvertibleSeniorNotesDue2029Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OwnershipPercentOfEquityMethodInvesteeByRelatedParty" id="osis_OwnershipPercentOfEquityMethodInvesteeByRelatedParty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="BillAndHoldServiceMember" id="osis_BillAndHoldServiceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageOnOriginalNumberOfSharesOrUnitsAwarded" id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageOnOriginalNumberOfSharesOrUnitsAwarded" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessCombinationContingentConsiderationLiabilityFairValueDisclosure" id="osis_BusinessCombinationContingentConsiderationLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtInstrumentIssuancePricePercentageOfPrincipalAmount" id="osis_DebtInstrumentIssuancePricePercentageOfPrincipalAmount" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentDefaultSettlementAmount" id="osis_DebtInstrumentDefaultSettlementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FiveConsecutiveBusinessDaysAfterSpecifiedPeriodMember" id="osis_FiveConsecutiveBusinessDaysAfterSpecifiedPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationContingentConsiderationHoldbackAmount" id="osis_BusinessCombinationContingentConsiderationHoldbackAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PrivatelyHeldProviderOfCriticalMilitarySpaceAndSurveillanceSolutionsMember" id="osis_PrivatelyHeldProviderOfCriticalMilitarySpaceAndSurveillanceSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationConsiderationTransferredExcludingContingentConsideration" id="osis_BusinessCombinationConsiderationTransferredExcludingContingentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryAndOtherCurrentAssets" id="osis_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryAndOtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapital" id="osis_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxLiability" id="osis_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SegmentIncomeLossFromOperations" id="osis_SegmentIncomeLossFromOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInContractWithCustomerLiabilityCustomerDepositsAndPrepayments" id="osis_IncreaseDecreaseInContractWithCustomerLiabilityCustomerDepositsAndPrepayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PresidentAndChiefExecutiveOfficerMember" id="osis_PresidentAndChiefExecutiveOfficerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PrivatelyHeldProviderOfEngineeringAndStructuralComponentMember" id="osis_PrivatelyHeldProviderOfEngineeringAndStructuralComponentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BorrowingsInForeignCurrenciesMember" id="osis_BorrowingsInForeignCurrenciesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity" id="osis_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SecuritizationOfQualifyingAssetsMaximumAmount" id="osis_SecuritizationOfQualifyingAssetsMaximumAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ConvertibleSeniorNotesDue2031Member" id="osis_ConvertibleSeniorNotesDue2031Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationAdditionOfContingentEarnoutObligations" id="osis_BusinessCombinationAdditionOfContingentEarnoutObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DeferredIncomeTaxAssetsLiabilitiesNet" id="osis_DeferredIncomeTaxAssetsLiabilitiesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NetIncomeTaxReceivablePayableCurrent" id="osis_NetIncomeTaxReceivablePayableCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LitigationSettlementFeeExpenseRecoveries" id="osis_LitigationSettlementFeeExpenseRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncentiveStockOptionsMember" id="osis_IncentiveStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficersCompensationAmount" id="osis_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOfficersCompensationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationPatentBoxBenefitAmount" id="osis_EffectiveIncomeTaxRateReconciliationPatentBoxBenefitAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfVotingPowerOwned" id="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfVotingPowerOwned" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NonTaxableIncomeOrNonDeductibleExpenseAmountAbstract" id="osis_NonTaxableIncomeOrNonDeductibleExpenseAmountAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NonTaxableIncomeOrNonDeductibleExpensePercentAbstract" id="osis_NonTaxableIncomeOrNonDeductibleExpensePercentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
