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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ANNALISA WEIGEL</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>1.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>FRANK CULBERTSON</PersonNm>
        <TitleTxt>TRUSTEE (FROM MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN R DOWDLE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LUISELLA GIULICCHI</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>R STEVEN JUSTICE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT LIGHTFOOT</PersonNm>
        <TitleTxt>TRUSTEE (FROM MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LOURDES MAURICE</PersonNm>
        <TitleTxt>TRUSTEE (FROM MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>GEORGE C NIELD</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>GP BUD PETERSON</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROBIE I SAMANTA ROY</PersonNm>
        <TitleTxt>TRUSTEE (TO MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DAVID A THROCKMORTON</PersonNm>
        <TitleTxt>TRUSTEE (TO MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES E VASATKA</PersonNm>
        <TitleTxt>TRUSTEE (TO MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KAREN WILLCOX</PersonNm>
        <TitleTxt>TRUSTEE (FROM MAY '20)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>2360589</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>453465</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>27</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>INTERNATIONAL ASTRONAUTICAL FEDERATION</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>100 AVE DE SUFFREN</AddressLine1Txt>
            <CityNm>PARIS</CityNm>
            <CountryCd>FR</CountryCd>
            <ForeignPostalCd>75015</ForeignPostalCd>
          </ForeignAddress>
        </ContractorAddress>
        <ServicesDesc>MEMBERSHIP &amp; EVENTS</ServicesDesc>
        <CompensationAmt>2165032</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>360 LIVE MEDIA</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1717 RHODE ISLAND AVE NW STE 640</AddressLine1Txt>
            <CityNm>WASHINGTON</CityNm>
            <StateAbbreviationCd>DC</StateAbbreviationCd>
            <ZIPCd>20036</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>STRATEGY &amp; MARKETING</ServicesDesc>
        <CompensationAmt>1358753</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>MANCHESTER GRAND HYATT SAN DIEGO</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1 MARKET PLACE</AddressLine1Txt>
            <CityNm>SAN DIEGO</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>92101</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONVENTION SERVICES</ServicesDesc>
        <CompensationAmt>1002628</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PRODUCTION RESOURCE GROUP</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 419470</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02241</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONVENTION SERVICES</ServicesDesc>
        <CompensationAmt>948029</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>ARAMARK</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1101 MARKET ST</AddressLine1Txt>
            <CityNm>PHILADELPHIA</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>19107</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONVENTION SERVICES</ServicesDesc>
        <CompensationAmt>725635</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>37</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>51860</AllOtherContributionsAmt>
      <TotalContributionsAmt>51860</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>PUBLICATIONS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>8791362</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>8791362</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>IAC EVENT</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>6101433</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>6101433</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CONFERENCES &amp; EDUCATION</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>3651643</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3651643</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBER SERVICES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>3361232</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3239487</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>121745</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>SPONSORSHIPS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>2861850</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>2861850</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>421440</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>421440</RelatedOrExemptFuncIncomeAmt>
      </TotalOthProgramServiceRevGrp>
      <TotalProgramServiceRevenueAmt>25188960</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>1227583</TotalRevenueColumnAmt>
        <ExclusionAmt>1227583</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>184245</TotalRevenueColumnAmt>
        <ExclusionAmt>184245</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>5878930</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>4713418</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>1165512</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1165512</TotalRevenueColumnAmt>
        <ExclusionAmt>1165512</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>BANNER ADS</Desc>
        <BusinessCd>541800</BusinessCd>
        <TotalRevenueColumnAmt>23400</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>23400</UnrelatedBusinessRevenueAmt>
      </OtherRevenueMiscGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>6807</TotalRevenueColumnAmt>
        <ExclusionAmt>6807</ExclusionAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>30207</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>27848367</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>25067215</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>145145</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>2584147</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>5000</TotalAmt>
        <ProgramServicesAmt>5000</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>8400</TotalAmt>
        <ProgramServicesAmt>8400</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>3600</TotalAmt>
        <ProgramServicesAmt>3600</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>1900990</TotalAmt>
        <ProgramServicesAmt>1533164</ProgramServicesAmt>
        <ManagementAndGeneralAmt>367826</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>5898700</TotalAmt>
        <ProgramServicesAmt>4762936</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1135764</ManagementAndGeneralAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>133079</TotalAmt>
        <ProgramServicesAmt>106689</ProgramServicesAmt>
        <ManagementAndGeneralAmt>26390</ManagementAndGeneralAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>838435</TotalAmt>
        <ProgramServicesAmt>577551</ProgramServicesAmt>
        <ManagementAndGeneralAmt>260884</ManagementAndGeneralAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>520466</TotalAmt>
        <ProgramServicesAmt>511875</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8591</ManagementAndGeneralAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>38995</TotalAmt>
        <ManagementAndGeneralAmt>38995</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>77431</TotalAmt>
        <ProgramServicesAmt>18718</ProgramServicesAmt>
        <ManagementAndGeneralAmt>58713</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>35782</TotalAmt>
        <ManagementAndGeneralAmt>35782</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>2743799</TotalAmt>
        <ProgramServicesAmt>2590889</ProgramServicesAmt>
        <ManagementAndGeneralAmt>152910</ManagementAndGeneralAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>759099</TotalAmt>
        <ProgramServicesAmt>759099</ProgramServicesAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>702067</TotalAmt>
        <ProgramServicesAmt>668055</ProgramServicesAmt>
        <ManagementAndGeneralAmt>34012</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>2496459</TotalAmt>
        <ProgramServicesAmt>2330816</ProgramServicesAmt>
        <ManagementAndGeneralAmt>165643</ManagementAndGeneralAmt>
      </InformationTechnologyGrp>
      <RoyaltiesGrp>
        <TotalAmt>137680</TotalAmt>
        <ProgramServicesAmt>137680</ProgramServicesAmt>
      </RoyaltiesGrp>
      <OccupancyGrp>
        <TotalAmt>441714</TotalAmt>
        <ProgramServicesAmt>359091</ProgramServicesAmt>
        <ManagementAndGeneralAmt>82623</ManagementAndGeneralAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>385717</TotalAmt>
        <ProgramServicesAmt>347784</ProgramServicesAmt>
        <ManagementAndGeneralAmt>37933</ManagementAndGeneralAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>6681750</TotalAmt>
        <ProgramServicesAmt>6606630</ProgramServicesAmt>
        <ManagementAndGeneralAmt>75120</ManagementAndGeneralAmt>
      </ConferencesMeetingsGrp>
      <PaymentsToAffiliatesGrp>
        <TotalAmt>403586</TotalAmt>
        <ProgramServicesAmt>403586</ProgramServicesAmt>
      </PaymentsToAffiliatesGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>336703</TotalAmt>
        <ProgramServicesAmt>286138</ProgramServicesAmt>
        <ManagementAndGeneralAmt>50565</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>109454</TotalAmt>
        <ProgramServicesAmt>105981</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3473</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>AWARDS &amp; HONORARIA</Desc>
        <TotalAmt>433446</TotalAmt>
        <ProgramServicesAmt>433446</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>JOURNALS AND PUBLICATIO</Desc>
        <TotalAmt>405153</TotalAmt>
        <ProgramServicesAmt>405153</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SECTION REBATE</Desc>
        <TotalAmt>193001</TotalAmt>
        <ProgramServicesAmt>193001</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>FULFILLMENT</Desc>
        <TotalAmt>155642</TotalAmt>
        <ProgramServicesAmt>144252</ProgramServicesAmt>
        <ManagementAndGeneralAmt>11390</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>347283</TotalAmt>
        <ProgramServicesAmt>389115</ProgramServicesAmt>
        <ManagementAndGeneralAmt>-41832</ManagementAndGeneralAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>26193431</TotalAmt>
        <ProgramServicesAmt>23688649</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2504782</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>5333419</BOYAmt>
        <EOYAmt>2940680</EOYAmt>
      </CashNonInterestBearingGrp>
      <AccountsReceivableGrp>
        <BOYAmt>148752</BOYAmt>
        <EOYAmt>114039</EOYAmt>
      </AccountsReceivableGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>3167500</BOYAmt>
        <EOYAmt>1376972</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>7222831</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>6107491</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>1442320</BOYAmt>
        <EOYAmt>1115340</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>35735813</BOYAmt>
        <EOYAmt>38245307</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>129667</BOYAmt>
        <EOYAmt>31067</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>45957471</BOYAmt>
        <EOYAmt>43823405</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>3603985</BOYAmt>
        <EOYAmt>3994996</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>11696217</BOYAmt>
        <EOYAmt>5098766</EOYAmt>
      </DeferredRevenueGrp>
      <UnsecuredNotesLoansPayableGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>963000</EOYAmt>
      </UnsecuredNotesLoansPayableGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>34326</BOYAmt>
        <EOYAmt>39476</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>15334528</BOYAmt>
        <EOYAmt>10096238</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>30204943</BOYAmt>
        <EOYAmt>33280167</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>418000</BOYAmt>
        <EOYAmt>447000</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>30622943</BOYAmt>
        <EOYAmt>33727167</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>45957471</BOYAmt>
        <EOYAmt>43823405</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>1654936</ReconcilationRevenueExpnssAmt>
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        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
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        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <PersonNm>ELIZABETH C SHERRILL</PersonNm>
        <TitleTxt>SENIOR DIRECTOR, IT</TitleTxt>
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        <PersonNm>JOHN BLACKSTEN</PersonNm>
        <TitleTxt>DIRECTOR, COMM (TO NOV '19)</TitleTxt>
        <BaseCompensationFilingOrgAmt>140487</BaseCompensationFilingOrgAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>HEALTH/SOCIAL CLUB DUES ARE AVAILABLE TO ALL STAFF MEMBERS. DURING THE TAX YEAR, 76 INDIVIDUALS RECEIVED THIS BENEFIT. IT WAS TAXABLE TO ALL WHO RECEIVED IT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>JOHN BLACKSTEN RECEIVED SEVERANCE OF $21,183</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>AIAA HAS A MERIT BONUS SYSTEM THAT APPLIES TO ALL EMPLOYEES AND IS MONITORED BY THE COMPENSATION COMMITTEE OF INDEPENDENT BOARD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATIONS BYLAWS WERE UPDATED AS FOLLOWS: THE RESTRICTION ON AFFILIATE MEMBERS VOTING AND HOLDING OFFICE WAS REMOVED. THE DEFINITION OF REGIONS WAS BROADENED TO INCLUDE STUDENT BRANCHES. THE OFFICE OF CHIEF OF THE SECTIONS AND REGIONS DIVISION WAS CHANGED TO THE OFFICE OF CHIEF OF THE REGIONAL ENGAGEMENT ACTIVITIES DIVISION. THE NUMBER OF BOARD SEATS WAS CHANGED FROM 11 TO 12. THE IMMEDIATE PAST PRESIDENT WILL NO LONGER SERVE AS THE CHAIR OF THE EXECUTIVE NOMINATING COMMITTEE, BUT RATHER THE INCUMBENT PRESIDENT WILL APPOINT THE CHAIR. THE QUALIFICATIONS FOR APPOINTMENT TO CHAIR OF THE COUNCIL OF DIRECTORS WERE ADJUSTED TO NO LONGER REQUIRE THAT A CHAIR BE A PAST SPEAKER OF THE COUNCIL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>AIAA DOES HAVE MEMBERS. ITS MEMBERSHIP CLASSES INCLUDE HONORARY FELLOWS, FELLOWS, ASSOCIATE FELLOWS, SENIOR MEMBERS, MEMBERS, HONORARY MEMBERS, AND STUDENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>HONORARY FELLOWS, FELLOWS, ASSOCIATE FELLOWS, SENIOR MEMBERS, AND MEMBERS SHALL BE ELIGIBLE TO HOLD OFFICE AND TO VOTE. HONORARY MEMBERS SHALL BE ENTITLED TO VOTE BUT SHALL NOT BE ENTITLED TO BE AN OFFICER OR DIRECTOR. MEMBERS VOTE ANNUALLY TO ELECT MEMBERS OF THE COUNCIL OF DIRECTORS AND BOARD OF TRUSTEES, AND WHEN NEEDED TO MAKE CHANGES TO THE INSTITUTE CONSTITUTION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGES TO THE CONSTITUTION MUST BE RATIFIED BY THE MEMBERSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS PLACED ON A WEBSITE FOR THE BOARD OF DIRECTORS TO REVIEW. MANAGEMENT REVIEWS FORM 990 BY VALIDATING THE ANSWERS AND RECONCILING FINANCIAL INFORMATION TO THE AUDITED FINANCIAL STATEMENTS TO ENSURE ACCURACY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, AIAA BOARD MEMBERS AND AIAA STAFF ARE REQUIRED TO SIGN A CONFLICT OF INTEREST POLICY ACKNOWLEDGEMENT AND DISCLOSURE STATEMENTS AND CERTIFY THAT THE REQUIREMENTS OF THIS POLICY HAVE BEEN MET.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD COMPENSATION COMMITTEE WILL ANNUALLY REVIEW AND RECOMMEND TO THE BOARD FOR APPROVAL THE SALARY ADJUSTMENT POOLS AND THE BONUS POOLS TO BE USED FOR STAFF COMPENSATION. THE COMPENSATION COMMITTEE CONSISTS OF INDEPENDENT BOARD MEMBERS, RELYING ON OUTSIDE KNOWLEDGEABLE CONSULTANTS, ARMED WITH RECENT AND RELEVANT SALARY SURVEYS, AND RECOMMENDS COMPENSATION TO THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS ARE AVAILABLE ON AIAA'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTANTS: PROGRAM SERVICE EXPENSES 1,322,826. MANAGEMENT AND GENERAL EXPENSES 152,886. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,475,712. OUTSIDE PRODUCTION: PROGRAM SERVICE EXPENSES 627,894. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 627,894. OTHER PROFESSIONAL FEES: PROGRAM SERVICE EXPENSES 472,300. MANAGEMENT AND GENERAL EXPENSES 24. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 472,324. EDITORS: PROGRAM SERVICE EXPENSES 167,869. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 167,869.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>BAD DEBT -2,620.</ExplanationTxt>
      </SupplementalInformationDetail>
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          <AddressLine1Txt>12700 SUNRISE VALLEY DR STE 200</AddressLine1Txt>
          <CityNm>RESTON</CityNm>
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