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  <xsd:element name="NewLeaseMember" id="prst_NewLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlatformMember" id="prst_PlatformMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TransactionMember" id="prst_TransactionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueAdjustmentOfWarrantsAndConvertiblePromissoryNotes" id="prst_FairValueAdjustmentOfWarrantsAndConvertiblePromissoryNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="OtherFinancingAndFinancialInstrumentCostsIncomeNet" id="prst_OtherFinancingAndFinancialInstrumentCostsIncomeNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ContractWithCustomerLiabilityAdditions" id="prst_ContractWithCustomerLiabilityAdditions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CustomerMember" id="prst_CustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MarketingDevelopmentExpensePayable" id="prst_MarketingDevelopmentExpensePayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="PercentageOfInterestAccruedOnUnpaidBalance" id="prst_PercentageOfInterestAccruedOnUnpaidBalance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="HandheldServicesPayable" id="prst_HandheldServicesPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="AlternativeInstallationAndReplacementServices" id="prst_AlternativeInstallationAndReplacementServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CoverExpensesRelatingToLiquidIngressIssue" id="prst_CoverExpensesRelatingToLiquidIngressIssue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AccruedInterestWaived" id="prst_AccruedInterestWaived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfCommissionPaidToRestaurants" id="prst_PercentageOfCommissionPaidToRestaurants" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfPremiumContentRevenue" id="prst_PercentageOfPremiumContentRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RevenueFromLeaseArrangements" id="prst_RevenueFromLeaseArrangements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="FinancingObligationsAbstract" id="prst_FinancingObligationsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfFinancingObligationsNetOfDiscountsTableTextBlock" id="prst_ScheduleOfFinancingObligationsNetOfDiscountsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReceivableFinancingFacilityMember" id="prst_ReceivableFinancingFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquipmentFinancingFacilityMember" id="prst_EquipmentFinancingFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TabletMember" id="prst_TabletMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FinancingObligationsDisclosureTextBlock" id="prst_FinancingObligationsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccruedExpensesCurrent" id="prst_AccruedExpensesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="StockIncentivePlan2008Member" id="prst_StockIncentivePlan2008Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityIncentivePlan2018Member" id="prst_EquityIncentivePlan2018Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncentiveAwardPlan2022Member" id="prst_IncentiveAwardPlan2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeesAndConsultantsMember" id="prst_EmployeesAndConsultantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ServiceBasedVestingAwardMember" id="prst_ServiceBasedVestingAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EarnoutSharesMember" id="prst_EarnoutSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeeStockPurchasePlanMember" id="prst_EmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockOfferingPeriod" id="prst_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockOfferingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CyborgOpsMember" id="prst_CyborgOpsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" id="prst_ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SilverRockMember" id="prst_SilverRockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfVotesForEachSharesHeld" id="prst_NumberOfVotesForEachSharesHeld" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfSharesHeldByInvestorPreMerger" id="prst_NumberOfSharesHeldByInvestorPreMerger" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="TerminationFee" id="prst_TerminationFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ExpensesAgreedToPay" id="prst_ExpensesAgreedToPay" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="OptionsAndRestrictedStockUnitsMember" id="prst_OptionsAndRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DeferredTransactionCosts" id="prst_DeferredTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DepreciationAmortizationAndImpairment" id="prst_DepreciationAmortizationAndImpairment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedPaymentArrangementNoncashExpenseEarnoutShares" id="prst_ShareBasedPaymentArrangementNoncashExpenseEarnoutShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ShareAndWarrantCostOnTerminationOfConvertibleNoteAgreement" id="prst_ShareAndWarrantCostOnTerminationOfConvertibleNoteAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FairValueAdjustmentOfUnvestedFounderSharesLiability" id="prst_FairValueAdjustmentOfUnvestedFounderSharesLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NoncashLeaseExpense" id="prst_NoncashLeaseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromIssuanceOfConvertiblePromissoryNotesAndEmbeddedWarrants" id="prst_ProceedsFromIssuanceOfConvertiblePromissoryNotesAndEmbeddedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PaymentsOfDeferredTransactionCosts" id="prst_PaymentsOfDeferredTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CapitalContributionFromShareholderInConjunctionWithCreditAgreement" id="prst_CapitalContributionFromShareholderInConjunctionWithCreditAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfWarrantsInConjunctionWithCreditAgreement" id="prst_IssuanceOfWarrantsInConjunctionWithCreditAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfWarrantsInConjunctionWithLagoTermLoan" id="prst_IssuanceOfWarrantsInConjunctionWithLagoTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromMergerAndPipeFinancingNet" id="prst_ProceedsFromMergerAndPipeFinancingNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ReclassificationOfWarrantsFromLiabilitiesToEquity" id="prst_ReclassificationOfWarrantsFromLiabilitiesToEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RecognitionOfLiabilityClassifiedWarrantsUponMerger" id="prst_RecognitionOfLiabilityClassifiedWarrantsUponMerger" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RecognitionOfUnvestedFounderSharesLiability" id="prst_RecognitionOfUnvestedFounderSharesLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForgivenessOfPppLoan" id="prst_ForgivenessOfPppLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TransactionCostsRecordedInAccountsPayableAndAccruedLiabilities" id="prst_TransactionCostsRecordedInAccountsPayableAndAccruedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodValueWarrantsExercised" id="prst_StockIssuedDuringPeriodValueWarrantsExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodSharesWarrantsExercised" id="prst_StockIssuedDuringPeriodSharesWarrantsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodValueTransferOfWarrantsUponTerminationOfConvertibleNoteAgreement" id="prst_StockIssuedDuringPeriodValueTransferOfWarrantsUponTerminationOfConvertibleNoteAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodSharesTransferOfWarrantsUponTerminationOfConvertibleNoteAgreement" id="prst_StockIssuedDuringPeriodSharesTransferOfWarrantsUponTerminationOfConvertibleNoteAgreement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AdjustmentsToAdditionalPaidInCapitalReclassificationOfLiabilityClassifiedWarrantsToEquity" id="prst_AdjustmentsToAdditionalPaidInCapitalReclassificationOfLiabilityClassifiedWarrantsToEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AdjustmentsToAdditionalPaidInCapitalContributionByShareholderInConjunctionWithCreditAgreement" id="prst_AdjustmentsToAdditionalPaidInCapitalContributionByShareholderInConjunctionWithCreditAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AdjustmentsToAdditionalPaidInCapitalEarnoutSharesStockBasedCompensation" id="prst_AdjustmentsToAdditionalPaidInCapitalEarnoutSharesStockBasedCompensation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodValueMergerAndPipeFinancing" id="prst_StockIssuedDuringPeriodValueMergerAndPipeFinancing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodSharesMergerAndPipeFinancing" id="prst_StockIssuedDuringPeriodSharesMergerAndPipeFinancing" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccruedLiabilitiesCurrentMember" id="prst_AccruedLiabilitiesCurrentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MatterRelatedToThirdPartySubcontractorMember" id="prst_MatterRelatedToThirdPartySubcontractorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DescriptionOfBusinessPolicyPolicyTextBlock" id="prst_DescriptionOfBusinessPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmergingGrowthCompanyStatusPolicyPolicyTextBlock" id="prst_EmergingGrowthCompanyStatusPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RiskAndUncertaintiesPolicyPolicyTextBlock" id="prst_RiskAndUncertaintiesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ImpactOfCovid19PolicyPolicyTextBlock" id="prst_ImpactOfCovid19PolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PaycheckProtectionProgramMember" id="prst_PaycheckProtectionProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CustomerBMember" id="prst_CustomerBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CustomerCMember" id="prst_CustomerCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CustomerDMember" id="prst_CustomerDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDifferenceBetweenCarryingAmountAndFairValueTableTextBlock" id="prst_ScheduleOfDifferenceBetweenCarryingAmountAndFairValueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="UnvestedFounderSharesLiabilityMember" id="prst_UnvestedFounderSharesLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConvertiblePromissoryNotesAndEmbeddedWarrantsMember" id="prst_ConvertiblePromissoryNotesAndEmbeddedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReclassificationOfLiabilityClassifiedWarrantsToEquity" id="prst_ReclassificationOfLiabilityClassifiedWarrantsToEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RecognitionOfWarrantsAndUnvestedFounderSharesLiabilities" id="prst_RecognitionOfWarrantsAndUnvestedFounderSharesLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ConversionOfWarrantLiabilityAndConvertiblePromissoryNotes" id="prst_ConversionOfWarrantLiabilityAndConvertiblePromissoryNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="MeasurementInputProbabilityOfConversionMember" id="prst_MeasurementInputProbabilityOfConversionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrivateFinancingMember" id="prst_PrivateFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PublicFinancingMember" id="prst_PublicFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ChangeInControlMember" id="prst_ChangeInControlMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MaturityDateMember" id="prst_MaturityDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BonusAndDeferredConsiderationExpense" id="prst_BonusAndDeferredConsiderationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TermLoansMember" id="prst_TermLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GainLossOnFairValueRemeasurementOfConvertiblePromissoryNotes" id="prst_GainLossOnFairValueRemeasurementOfConvertiblePromissoryNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AdjustmentToAdditionalPaidInCapitalReclassificationOnConversionOfConvertibleDebt" id="prst_AdjustmentToAdditionalPaidInCapitalReclassificationOnConversionOfConvertibleDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="HorizonTermLoanMember" id="prst_HorizonTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LagoTermLoansMember" id="prst_LagoTermLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfPaymentOfDebtAccruedInterest" id="prst_NumberOfPaymentOfDebtAccruedInterest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfPaymentOfDebtPrincipalAndAccruedInterest" id="prst_NumberOfPaymentOfDebtPrincipalAndAccruedInterest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CreditAgreementMember" id="prst_CreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentPercentageOfCapitalizedInterestPaymentAsPikInterest" id="prst_DebtInstrumentPercentageOfCapitalizedInterestPaymentAsPikInterest" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentCovenantConsolidatedLeverageRatio" id="prst_DebtInstrumentCovenantConsolidatedLeverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PaymentInKindInterestExpense" id="prst_PaymentInKindInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PrincipalAmountOfTermLoanOutstanding" id="prst_PrincipalAmountOfTermLoanOutstanding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="PaymentInKindInterestAccruedNet" id="prst_PaymentInKindInterestAccruedNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentInterestRatePaidInKindPercentage" id="prst_DebtInstrumentInterestRatePaidInKindPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="LegacyPrestoLlcMember" id="prst_LegacyPrestoLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromTrustAndWorkingCapitalCash" id="prst_ProceedsFromTrustAndWorkingCapitalCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TransactionCostsAndOtherPayments" id="prst_TransactionCostsAndOtherPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AmountPlacedInTrustAccount" id="prst_AmountPlacedInTrustAccount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="UnredeemedFunds" id="prst_UnredeemedFunds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="OtherCostsNotRelatedToMerger" id="prst_OtherCostsNotRelatedToMerger" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="UnpaidTransactionCostsRelatedToMerger" id="prst_UnpaidTransactionCostsRelatedToMerger" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationExchangeRatio" id="prst_BusinessCombinationExchangeRatio" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ThirdAnniversaryMember" id="prst_ThirdAnniversaryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FifthAnniversaryMember" id="prst_FifthAnniversaryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EarnoutArrangementThresholdTradingDays" id="prst_EarnoutArrangementThresholdTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EarnoutArrangementThresholdConsecutiveTradingDays" id="prst_EarnoutArrangementThresholdConsecutiveTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedPaymentArrangementTrancheFourMember" id="prst_ShareBasedPaymentArrangementTrancheFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="UnvestedFoundersShares" id="prst_UnvestedFoundersShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfConsecutiveTradingDays" id="prst_NumberOfConsecutiveTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfTradingDays" id="prst_NumberOfTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SharesAuthorized" id="prst_SharesAuthorized" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="WarrantsAndRightsNoteDisclosureTextBlock" id="prst_WarrantsAndRightsNoteDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PublicWarrantsMember" id="prst_PublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrivateWarrantsMember" id="prst_PrivateWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WarrantsExercised" id="prst_WarrantsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiabilityClassifiedWarrantsReclassifiedToEquityShares" id="prst_LiabilityClassifiedWarrantsReclassifiedToEquityShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsOneMember" id="prst_CommonWarrantsOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsTwoMember" id="prst_CommonWarrantsTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsThreeMember" id="prst_CommonWarrantsThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsFourMember" id="prst_CommonWarrantsFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsFiveMember" id="prst_CommonWarrantsFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsSixMember" id="prst_CommonWarrantsSixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsSevenMember" id="prst_CommonWarrantsSevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsEightMember" id="prst_CommonWarrantsEightMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsNineMember" id="prst_CommonWarrantsNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsTenMember" id="prst_CommonWarrantsTenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsElevenMember" id="prst_CommonWarrantsElevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsTwelveMember" id="prst_CommonWarrantsTwelveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsThirteenMember" id="prst_CommonWarrantsThirteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsFourteenMember" id="prst_CommonWarrantsFourteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsFifteenMember" id="prst_CommonWarrantsFifteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsSixteenMember" id="prst_CommonWarrantsSixteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClassOfWarrantOrRightsIntrinsicValue" id="prst_ClassOfWarrantOrRightsIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="StockOptionsAndRestrictedStockUnitsMember" id="prst_StockOptionsAndRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PaymentOfTransactionCost" id="prst_PaymentOfTransactionCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="MergerRelatedTransactionCostPayable" id="prst_MergerRelatedTransactionCostPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="EarnOutShares" id="prst_EarnOutShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MajorCustomersMember" id="prst_MajorCustomersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfNetProceedsFromTrustAndPipePrivatePlacementTableTextBlock" id="prst_ScheduleOfNetProceedsFromTrustAndPipePrivatePlacementTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExtinguishmentOfDebtPrincipalAmount" id="prst_ExtinguishmentOfDebtPrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ExtinguishmentOfDebtInterestAmount" id="prst_ExtinguishmentOfDebtInterestAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" id="prst_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="LiabilityForUnvestedFounderShares" id="prst_LiabilityForUnvestedFounderShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="CommonWarrantsOneTwoAndThreeMember" id="prst_CommonWarrantsOneTwoAndThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonWarrantsEightNineAndTenMember" id="prst_CommonWarrantsEightNineAndTenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfContingentWarrantsOutstanding" id="prst_NumberOfContingentWarrantsOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="CancellationOfRefundRequested" id="prst_CancellationOfRefundRequested" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NumberOfInterestOnlyPaymentDates" id="prst_NumberOfInterestOnlyPaymentDates" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="EquityAwardsMember" id="prst_EquityAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInVendorFinancingFacility" id="prst_IncreaseDecreaseInVendorFinancingFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="UnvestedFounderShareLiabilityMeasurementInput" id="prst_UnvestedFounderShareLiabilityMeasurementInput" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="AccruedPayrollCurrent" id="prst_AccruedPayrollCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="UnvestedFounderSharesLiabilityNoncurrent" id="prst_UnvestedFounderSharesLiabilityNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="AdjustmentsToAdditionalPaidInCapitalForFairValueOfIssuedWarrants" id="prst_AdjustmentsToAdditionalPaidInCapitalForFairValueOfIssuedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ContraRevenueAssociatedWithWarrantAgreement" id="prst_ContraRevenueAssociatedWithWarrantAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IssuanceOfWarrants" id="prst_IssuanceOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TermOfContract" id="prst_TermOfContract" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AiPlatformMember" id="prst_AiPlatformMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccruedRepairCost" id="prst_AccruedRepairCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NumberOfRevenueStreams" id="prst_NumberOfRevenueStreams" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FiniteLivedIntangibleAssetsLessCapitalizedIntangibleAssetsNet" id="prst_FiniteLivedIntangibleAssetsLessCapitalizedIntangibleAssetsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ChangeInFairValueOfWarrantsAndConvertiblePromissoryNotesAndOther" id="prst_ChangeInFairValueOfWarrantsAndConvertiblePromissoryNotesAndOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentOfRevenuePaidToVendor" id="prst_PercentOfRevenuePaidToVendor" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GamingMember" id="prst_GamingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PercentageOfLoanToBeForgivenBeingUsedForPayroll" id="prst_PercentageOfLoanToBeForgivenBeingUsedForPayroll" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="GainOnRemeasurementOfUnvestedFounderShares" id="prst_GainOnRemeasurementOfUnvestedFounderShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LossOnRemeasurementOfUnvestedFounderShares" id="prst_LossOnRemeasurementOfUnvestedFounderShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtInterestPeriodOfTimeOneMember" id="prst_DebtInterestPeriodOfTimeOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInterestPeriodOfTimeTwoMember" id="prst_DebtInterestPeriodOfTimeTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseInInterestRate" id="prst_IncreaseInInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CommonWarrantsSeventeenMember" id="prst_CommonWarrantsSeventeenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EarliestPeriodSpecifiedUnderArrangementMember" id="prst_EarliestPeriodSpecifiedUnderArrangementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SecondPeriodSpecifiedUnderArrangementMember" id="prst_SecondPeriodSpecifiedUnderArrangementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EmployeesConsultantsAndDirectorsMember" id="prst_EmployeesConsultantsAndDirectorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance" id="prst_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectOnBasicEarningsPerShareChangeInFairValueConvertibleNotes" id="prst_EffectOnBasicEarningsPerShareChangeInFairValueConvertibleNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ThirdPeriodSpecifiedUnderArrangementMember" id="prst_ThirdPeriodSpecifiedUnderArrangementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ChangeInFairValueOfConvertibleNotes" id="prst_ChangeInFairValueOfConvertibleNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MonthlyPaymentProfessionalFees" id="prst_MonthlyPaymentProfessionalFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="July2021NotesMember" id="prst_July2021NotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="February2022NotesMember" id="prst_February2022NotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DirectorAndCeoMember" id="prst_DirectorAndCeoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CashCovenantRequirementAmount" id="prst_CashCovenantRequirementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
</xsd:schema>
