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        <PersonNm>ROBERT HILBORN</PersonNm>
        <TitleTxt>ASSOCIATE EXECUTIVE OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>127503</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>28751</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ERWIN CAMPBELL</PersonNm>
        <TitleTxt>IT DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>115745</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>17975</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TERRENCE HUNT</PersonNm>
        <TitleTxt>WEB DEVELOPER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>105865</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>11794</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>677097</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>141129</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>5</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>AMER INST OF PHYSICS PUBLSHING LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1305 WALT WHITMAN ROAD</AddressLine1Txt>
            <CityNm>MELLVILLE</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>11747</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>PUBLISHING SERVICES</ServicesDesc>
        <CompensationAmt>385821</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>AMERICAN INSTITUTE OF PHYSICS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1 PHYSICS ELLIPSE</AddressLine1Txt>
            <CityNm>COLLEGE PARK</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20740</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>TECHNICAL AND OFFICE SERVICES</ServicesDesc>
        <CompensationAmt>237890</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>THERESA NEIL DESIGN</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>4806 AVENUE H</AddressLine1Txt>
            <CityNm>AUSTIN</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>78751</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>WEB DESIGN</ServicesDesc>
        <CompensationAmt>230213</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>ALLEN PRESS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1041 NEW HAMPSHIRE</AddressLine1Txt>
            <CityNm>LAWRENCE</CityNm>
            <StateAbbreviationCd>KS</StateAbbreviationCd>
            <ZIPCd>66044</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>PUBLICATIONS SERVICES</ServicesDesc>
        <CompensationAmt>143761</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>DICKINSON COLLEGE</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>COLLEGE LOUTHER STREET</AddressLine1Txt>
            <CityNm>CARLISLE</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>17013</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>EDITORIAL SERVICES</ServicesDesc>
        <CompensationAmt>112053</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>6</CntrctRcvdGreaterThan100KCnt>
      <GovernmentGrantsAmt>1430310</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>70873</AllOtherContributionsAmt>
      <TotalContributionsAmt>1501183</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>PUBLICATIONS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>2585013</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>2512970</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>72043</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEETINGS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>907146</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>907146</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>761449</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>761449</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CAREER CENTER</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>9171</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>9171</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>4262779</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>118291</TotalRevenueColumnAmt>
        <ExclusionAmt>118291</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>9672</TotalRevenueColumnAmt>
        <ExclusionAmt>9672</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>4010910</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>3688566</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>322344</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>322344</TotalRevenueColumnAmt>
        <ExclusionAmt>322344</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <GrossSalesOfInventoryAmt>44224</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>32698</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>11526</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>11526</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>4793</TotalRevenueColumnAmt>
        <ExclusionAmt>4793</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>4793</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>6230588</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>4193091</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>81214</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>455100</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>51679</TotalAmt>
        <ProgramServicesAmt>51679</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>44837</TotalAmt>
        <ProgramServicesAmt>44837</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>410593</TotalAmt>
        <ManagementAndGeneralAmt>410593</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>1595209</TotalAmt>
        <ProgramServicesAmt>1058249</ProgramServicesAmt>
        <ManagementAndGeneralAmt>536836</ManagementAndGeneralAmt>
        <FundraisingAmt>124</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>137159</TotalAmt>
        <ProgramServicesAmt>92539</ProgramServicesAmt>
        <ManagementAndGeneralAmt>44609</ManagementAndGeneralAmt>
        <FundraisingAmt>11</FundraisingAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>422793</TotalAmt>
        <ProgramServicesAmt>261034</ProgramServicesAmt>
        <ManagementAndGeneralAmt>161728</ManagementAndGeneralAmt>
        <FundraisingAmt>31</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>155981</TotalAmt>
        <ProgramServicesAmt>85830</ProgramServicesAmt>
        <ManagementAndGeneralAmt>70141</ManagementAndGeneralAmt>
        <FundraisingAmt>10</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>9026</TotalAmt>
        <ManagementAndGeneralAmt>9026</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>41325</TotalAmt>
        <ManagementAndGeneralAmt>41325</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>33486</TotalAmt>
        <ProgramServicesAmt>33486</ProgramServicesAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>532554</TotalAmt>
        <ProgramServicesAmt>531623</ProgramServicesAmt>
        <ManagementAndGeneralAmt>931</ManagementAndGeneralAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>20607</TotalAmt>
        <ProgramServicesAmt>20607</ProgramServicesAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>360545</TotalAmt>
        <ProgramServicesAmt>174744</ProgramServicesAmt>
        <ManagementAndGeneralAmt>185601</ManagementAndGeneralAmt>
        <FundraisingAmt>200</FundraisingAmt>
      </OfficeExpensesGrp>
      <RoyaltiesGrp>
        <TotalAmt>567</TotalAmt>
        <ManagementAndGeneralAmt>567</ManagementAndGeneralAmt>
      </RoyaltiesGrp>
      <OccupancyGrp>
        <TotalAmt>229069</TotalAmt>
        <ManagementAndGeneralAmt>229069</ManagementAndGeneralAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>345000</TotalAmt>
        <ProgramServicesAmt>238197</ProgramServicesAmt>
        <ManagementAndGeneralAmt>106803</ManagementAndGeneralAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>220626</TotalAmt>
        <ProgramServicesAmt>197836</ProgramServicesAmt>
        <ManagementAndGeneralAmt>22790</ManagementAndGeneralAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>325</TotalAmt>
        <ProgramServicesAmt>90</ProgramServicesAmt>
        <ManagementAndGeneralAmt>235</ManagementAndGeneralAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>36942</TotalAmt>
        <ManagementAndGeneralAmt>36942</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>19912</TotalAmt>
        <ProgramServicesAmt>2946</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16966</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>ALLOC. OF ADMIN. EXPENS</Desc>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>1507551</ProgramServicesAmt>
        <ManagementAndGeneralAmt>-1507770</ManagementAndGeneralAmt>
        <FundraisingAmt>219</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PARTICIPANT SUPPORT</Desc>
        <TotalAmt>342901</TotalAmt>
        <ProgramServicesAmt>342901</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PUBLICATIONS</Desc>
        <TotalAmt>197634</TotalAmt>
        <ProgramServicesAmt>197634</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>EDITORIAL OFFICE</Desc>
        <TotalAmt>171377</TotalAmt>
        <ProgramServicesAmt>171377</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>492867</TotalAmt>
        <ProgramServicesAmt>392000</ProgramServicesAmt>
        <ManagementAndGeneralAmt>100867</ManagementAndGeneralAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>5873014</TotalAmt>
        <ProgramServicesAmt>5405160</ProgramServicesAmt>
        <ManagementAndGeneralAmt>467259</ManagementAndGeneralAmt>
        <FundraisingAmt>595</FundraisingAmt>
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      <CashNonInterestBearingGrp>
        <BOYAmt>1791437</BOYAmt>
        <EOYAmt>1694145</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>855197</BOYAmt>
        <EOYAmt>491462</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>793780</BOYAmt>
        <EOYAmt>1004201</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <AccountsReceivableGrp>
        <BOYAmt>90305</BOYAmt>
        <EOYAmt>90443</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>9713</BOYAmt>
        <EOYAmt>76462</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>57437</BOYAmt>
        <EOYAmt>113409</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>268356</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>193504</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>80539</BOYAmt>
        <EOYAmt>74852</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>4930279</BOYAmt>
        <EOYAmt>6066551</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>1018479</BOYAmt>
        <EOYAmt>976738</EOYAmt>
      </InvestmentsProgramRelatedGrp>
      <TotalAssetsGrp>
        <BOYAmt>9627166</BOYAmt>
        <EOYAmt>10588263</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>453261</BOYAmt>
        <EOYAmt>417743</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>2133870</BOYAmt>
        <EOYAmt>2356054</EOYAmt>
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      <OtherLiabilitiesGrp>
        <BOYAmt>354969</BOYAmt>
        <EOYAmt>476880</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>2942100</BOYAmt>
        <EOYAmt>3250677</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>5611231</BOYAmt>
        <EOYAmt>6114501</EOYAmt>
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      <TemporarilyRstrNetAssetsGrp>
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        <EOYAmt>734850</EOYAmt>
      </TemporarilyRstrNetAssetsGrp>
      <PermanentlyRstrNetAssetsGrp>
        <BOYAmt>488235</BOYAmt>
        <EOYAmt>488235</EOYAmt>
      </PermanentlyRstrNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>6685066</BOYAmt>
        <EOYAmt>7337586</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>9627166</BOYAmt>
        <EOYAmt>10588263</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>357574</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>364900</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>-69954</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>1</FederalGrantAuditRequiredInd>
      <FederalGrantAuditPerformedInd>1</FederalGrantAuditPerformedInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>1681288</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1672167</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1791373</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1685393</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1501183</CurrentTaxYearAmt>
        <TotalAmt>8331404</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
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        <CurrentTaxYearMinus3YearsAmt>3650949</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3792844</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3731924</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>4225789</CurrentTaxYearAmt>
        <TotalAmt>19008117</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>5287899</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>5323116</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5584217</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>5417317</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5726972</CurrentTaxYearAmt>
        <TotalAmt>27339521</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <CurrentTaxYearMinus4YearsAmt>10000</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>20000</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>20000</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>11495</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>10000</CurrentTaxYearAmt>
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      <SubstantialContributorsAmtGrp>
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      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
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        <CurrentTaxYearMinus3YearsAmt>20000</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>20000</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>11495</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>10000</CurrentTaxYearAmt>
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      <GrossInvestmentIncome509Grp>
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        <CurrentTaxYearMinus3YearsAmt>95333</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>206246</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>113058</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>127963</CurrentTaxYearAmt>
        <TotalAmt>626624</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>84024</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>95333</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>206246</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>113058</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>127963</CurrentTaxYearAmt>
        <TotalAmt>626624</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <OtherIncome509Grp>
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        <CurrentTaxYearAmt>4793</CurrentTaxYearAmt>
        <TotalAmt>17934</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>5371923</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>5418449</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5803604</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>5530375</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5859728</CurrentTaxYearAmt>
        <TotalAmt>27984079</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.97440</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.95940</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.02240</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.01990</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
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        <InvestmentEarningsOrLossesAmt>476643</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>25669</GrantsOrScholarshipsAmt>
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        <AdministrativeExpensesAmt>18364</AdministrativeExpensesAmt>
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        <InvestmentEarningsOrLossesAmt>357881</InvestmentEarningsOrLossesAmt>
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        <EndYearBalanceAmt>2284235</EndYearBalanceAmt>
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        <InvestmentEarningsOrLossesAmt>217595</InvestmentEarningsOrLossesAmt>
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        <ContributionsAmt>2187</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>160745</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>31162</OtherExpendituresAmt>
        <EndYearBalanceAmt>2101057</EndYearBalanceAmt>
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      <BoardDesignatedBalanceEOYPct>0.52000</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.19000</PrmnntEndowmentBalanceEOYPct>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
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        <DepreciationAmt>99249</DepreciationAmt>
        <BookValueAmt>37292</BookValueAmt>
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        <DepreciationAmt>94255</DepreciationAmt>
        <BookValueAmt>37560</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>74852</TotalBookValueLandBuildingsAmt>
      <InvstProgramRelatedOrgGrp>
        <Desc>INVESTMENT IN ACP</Desc>
        <BookValueAmt>976738</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <TotalBookValueProgramRltdAmt>976738</TotalBookValueProgramRltdAmt>
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        <Desc>CAPITAL LEASE OBLIGATION</Desc>
        <Amt>4053</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>ACCRUED POSTRETIREMENT BENEFIT</Desc>
        <Amt>359919</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>REFUNDABLE ADVANCE</Desc>
        <Amt>112908</Amt>
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      <TotalLiabilityAmt>476880</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>6586463</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>364900</NetUnrealizedGainsInvstAmt>
      <OtherRevenueAmt>-9025</OtherRevenueAmt>
      <RevenueNotReportedAmt>355875</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>6230588</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>6230588</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>5905712</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>32698</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>32698</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>5873014</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
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        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>TO FUND AWARDS, TRAVEL GRANTS, SECTION GRANTS, AND MEMBERSHIPS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR THE YEAR ENDED DECEMBER 31, 2017, THE ASSOCIATION HAS DOCUMENTED ITS CONSIDERATION OF FASB ASC 740-10, INCOME TAXES, THAT PROVIDES GUIDANCE FOR REPORTING UNCERTAINTY IN INCOME TAXES AND HAS DETERMINED THAT NO MATERIAL UNCERTAIN TAX POSITIONS QUALIFY FOR EITHER RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>LOSS ON INVESTMENT IN ACP REPORTED ON THE FINANCIAL -41,723. STATEMENTS AS REVENUE BUT REPORTED AS OTHER CHANGE IN NET ASSETS ON FORM 990, PART XI, LINE 9. COST OF GOODS SOLD REPORTED AS EXPENSE ON THE FINANCIAL 32,698. STATEMENTS AND NETTED AGAINST REVENUE ON FORM 990, PART VIII, LINE 10B.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF GOODS SOLD REPORTED AS EXPENSE ON THE FINANCIAL 32,698. STATEMENTS AND NETTED AGAINST REVENUE ON FORM 990, PART VIII, LINE 10B.</ExplanationTxt>
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    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BROWN UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>69 BROWN STREET 2ND FL</AddressLine1Txt>
          <CityNm>PROVIDENCE</CityNm>
          <StateAbbreviationCd>RI</StateAbbreviationCd>
          <ZIPCd>02912</ZIPCd>
        </USAddress>
        <RecipientEIN>050258809</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>51679</CashGrantAmt>
        <PurposeOfGrantTxt>PROGRAM CONTRIBUTION</PurposeOfGrantTxt>
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      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2017 SUMMER MEETING CHILD CARE GRANT</GrantTypeTxt>
        <RecipientCnt>9</RecipientCnt>
        <CashGrantAmt>2725</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2017 WINTER MEETING CHILD CARE GRANT</GrantTypeTxt>
        <RecipientCnt>4</RecipientCnt>
        <CashGrantAmt>1250</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>AAPT ALPHA AWARD EXPERIMENT</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>8000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>EXCELLENCE IN PRECOLLEGE PHYSICS TEACHING AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>EXCELLENCE IN UNDERGRADUATE PHYSICS EDUCATION AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>KLOPSTEG AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>LOTZE SCHOLARSHIP FUND</GrantTypeTxt>
        <RecipientCnt>7</RecipientCnt>
        <CashGrantAmt>14000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>MILLIKAN AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>OERSTED AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>RICHTMYER MEMORIAL AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STUDENT FUN MEMBERSHIPS</GrantTypeTxt>
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        <CashGrantAmt>864</CashGrantAmt>
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        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>IT IS THE GOAL OF THE AAPT TO ENCOURAGE HIGH SCHOOL TEACHERS TO EXPERIMENT AND IMPROVE ON THEIR TEACHING PRACTICES. IT IS OUR BELIEF THAT AS TEACHING PRACTICE IMPROVES, THEN PHYSICS ENROLLMENT AND EXCITEMENT AMONG STUDENTS INCREASE. AS A RESULT, WE OFFER THE HIGH SCHOOL PHYSIC TEACHER GRANT. WE HOPE THAT THIS GRANT CAN PROVIDE THE FUNDS TO KICK START THE IMPLEMENTATION OF THESE PRACTICES. THE GRANT(S) ARE GIVEN EACH YEAR TO THE TEACHERS WHOSE PROPOSAL MEETS THE GOAL OF THE GRANT. THAT IS, THE PROCEDURE SHOULD RESULT IN BETTER TEACHING PRACTICE, STUDENT UNDERSTANDING AND INTEREST, AND/OR INCREASED ENROLLMENT. ALSO, THE PROPOSAL SHOULD CONTAIN SOME INNOVATIVE IDEAS. FOR EXAMPLE, THE PROPOSAL MAY USE A NEW TEACHING METHOD OR AN ADAPTATION OF AN EXISTING IDEA. THE AAPT EXECUTIVE BOARD OFFERS SCHOLARSHIPS FOR FUTURE HIGH SCHOOL PHYSICS TEACHERS. THESE SCHOLARSHIPS, SUPPORTED BY AN ENDOWMENT FUNDED BY BARBARA LOTZE, ARE AVAILABLE ONLY TO US CITIZENS ATTENDING US SCHOOLS, UNDERGRADUATE STUDENTS ENROLLED, OR PLANNING TO ENROLL, IN PHYSICS TEACHER PREPARATION CURRICULA. AND HIGH SCHOOL SENIORS ENTERING SUCH PROGRAMS ARE ELIGIBLE. SUCCESSFUL APPLICANTS RECEIVE A STIPEND OF UP TO $2,000. THE SCHOLARSHIP MAY BE GRANTED TO AN INDIVIDUAL FOR EACH OF FOUR YEARS. APPLICATIONS WILL BE ACCEPTED AT ANY TIME AND WILL BE CONSIDERED FOR RECOMMENDATION TO THE EXECUTIVE BOARD AT EACH AAPT WINTER MEETING. ALL APPLICATIONS IN WHICH ALL MATERIALS, INCLUDING LETTERS OF RECOMMENDATION, ARE RECEIVED BY DECEMBER 1 WILL BE CONSIDERED FOR RECOMMENDATION AT THE WINTER MEETING OF THE AAPT EXECUTIVE BOARD.</ExplanationTxt>
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      <IndependentConsultantInd>X</IndependentConsultantInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
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      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <PersonNm>MICHAEL BROSNAN</PersonNm>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <PersonNm>ROBERT HILBORN</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11855</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16896</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>156254</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERSHIP OF THE ASSOCIATION IS MADE UP OF FOUR YEAR UNIVERSITY/COLLEGE AND TWO YEAR COLLEGE PROFESSORS AND EDUCATORS OF THE PHYSICS SCIENCES, IN THE UNITED STATES AND INTERNATIONALLY. THE MEMBERSHIP ALSO INCLUDES HIGH SCHOOL EDUCATORS, STUDENTS OF PHYSICS/SCIENCES AND RETIRED MEMBERS IN THE UNITED STATES AND INTERNATIONALLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NOMINATION COMMITTEE WILL NOMINATE MEMBERS OF THE GOVERNING BODY WHO THEN ARE ELECTED BY THE GENERAL MEMBERSHIP BY BALLOT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 WILL BE POSTED ON THE BOARD WEBSITE AND MEMBERS ARE INFORMED BY EMAIL. THE BOARD MEMBER IS ASKED TO INQUIRE, REVIEW AND ASK QUESTIONS RELATED TO THE TAX RETURN. AFTER ALL BOARD ISSUES HAVE BEEN RESPONDED TO, THE FORM 990 WILL BE FILED WITH THE IRS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING BODY IS REQUIRED TO RESPOND ELECTRONICALLY TO THE CONFLICT OF INTEREST QUESTIONAIRE ON A YEARLY BASIS. ALL NEW EXECUTIVE BOARD MEMBERS SUBMIT A CONFLICT OF INTEREST STATEMENT, PRIOR TO THE MEMBER START DATE. IF IT HAS BEEN DETERMINED THAT A CONFLICT OF INTEREST EXISTS, THE COVERED PERSON MAKES A PRESENTATION AT THE EXECUTIVE BOARD OR AUTHORIZED COMMITTEE MEETING. AFTER THE PRESENTATION, HE/SHE LEAVES THE MEETING DURING THE DISCUSSION OF, AND THE VOTE ON, THE TRANSACTION OR ARRANGEMENT INVOLVING THE CONFLICT OF INTEREST. THE EXECUTIVE BOARD, OR AN AUTHORIZED COMMITTEE, DETERMINES BY A MAJORITY VOTE OF THE DISINTERESTED AND INDEPENDENT DIRECTORS PRESENT AT THE MEETING (IF A QUORUM IS PRESENT AT THE TIME OF THE VOTE) WHETHER TO APPROVE THE TRANSACTION. IF THE EXECUTIVE BOARD OR AUTHORIZED COMMITTEE HAS REASONABLE CAUSE TO BELIEVE THAT A COVERED PERSON HAS FAILED TO DISCLOSE A CONFLICT OF INTEREST OR POTENTIAL CONFLICT OF INTEREST, IT INFORMS THE PERSON OF THE BASIS FOR SUCH BELIEF AND AFFORDS THE COVERED PERSON AN OPPORTUNITY TO EXPLAIN THE ALLEGED FAILURE TO DISCLOSE. IF, AFTER HEARING THE COVERED PERSON'S RESPONSE AND AFTER MAKING FURTHER INVESTIGATION AS WARRANTED BY THE CIRCUMSTANCES, THE EXECUTIVE BOARD OR AUTHORIZED COMMITTEE DETERMINES THE COVERED PERSON HAS FAILED TO DISCLOSE A CONFLICT OF INTEREST OR POTENTIAL CONFLICT OF INTEREST, IT TAKES APPROPRIATE CORRECTIVE ACTION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE REVIEWS COMPENSATION OF THE EXECUTIVE OFFICER AND KEY EMPLOYEES USING COMPARABILITY DATA OF SIMILAR SIZE NONPROFIT ORGANIZATIONS, USING PUBLISHED SALARY GUIDES. THE COMPENSATION DISCUSSIONS ARE ALSO HELD BY THE ENTIRE BOARD. THEY ARE RECORDED IN EXECUTIVE SESSION. THE LAST COMPENSATION REVIEW TOOK PLACE IN JANUARY 2017.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DOCUMENTS ARE POSTED ON THE ORGANIZATION'S WEBSITE AND COPIES PROVIDED ON REQUEST. INSPECTIONS ARE AVAILABLE AT THE ASSOCIATION'S NATIONAL OFFICE, BY APPOINTMENT. THE DOCUMENTS ARE AVAILABLE FOR THE SAME PERIOD OF DISCLOSURE, AS SET FORTH IN SECTION 6104(D).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN POST-RETIREMENT PLAN OBLIGATION -28,231. UNREALIZED LOSS IN ACP -41,723.</ExplanationTxt>
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          <BusinessNameLine1Txt>AMERICAN CENTER FOR PHYSICS</BusinessNameLine1Txt>
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          <AddressLine1Txt>1 PHYSICS ELLIPSE</AddressLine1Txt>
          <CityNm>COLLEGE PARK</CityNm>
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      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AMERICAN CENTER FOR PHYSICS INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>K</TransactionTypeTxt>
        <InvolvedAmt>293256</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FMV</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AMERICAN CENTER FOR PHYSICS INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>S</TransactionTypeTxt>
        <InvolvedAmt>33220</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FMV</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>