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      <OtherEmployeeBenefits>
        <Total>3447536</Total>
        <ProgramServices>1317491</ProgramServices>
        <ManagementAndGeneral>2061846</ManagementAndGeneral>
        <Fundraising>68199</Fundraising>
      </OtherEmployeeBenefits>
      <PayrollTaxes>
        <Total>1859569</Total>
        <ProgramServices>1320294</ProgramServices>
        <ManagementAndGeneral>520679</ManagementAndGeneral>
        <Fundraising>18596</Fundraising>
      </PayrollTaxes>
      <FeesForServicesManagement>
        <Total>0</Total>
      </FeesForServicesManagement>
      <FeesForServicesLegal>
        <Total>904245</Total>
        <ManagementAndGeneral>904245</ManagementAndGeneral>
      </FeesForServicesLegal>
      <FeesForServicesAccounting>
        <Total>212498</Total>
        <ProgramServices>2981</ProgramServices>
        <ManagementAndGeneral>209517</ManagementAndGeneral>
      </FeesForServicesAccounting>
      <FeesForServicesLobbying>
        <Total>109147</Total>
        <ProgramServices>109147</ProgramServices>
      </FeesForServicesLobbying>
      <FeesForServicesProfFundraising>
        <Total>0</Total>
      </FeesForServicesProfFundraising>
      <FeesForServicesInvstMgmntFees>
        <Total>75123</Total>
        <ManagementAndGeneral>75123</ManagementAndGeneral>
      </FeesForServicesInvstMgmntFees>
      <FeesForServicesOther>
        <Total>262515</Total>
        <ProgramServices>248861</ProgramServices>
        <ManagementAndGeneral>13654</ManagementAndGeneral>
      </FeesForServicesOther>
      <Advertising>
        <Total>1546881</Total>
        <ProgramServices>1536563</ProgramServices>
        <ManagementAndGeneral>450</ManagementAndGeneral>
        <Fundraising>9868</Fundraising>
      </Advertising>
      <OfficeExpenses>
        <Total>692955</Total>
        <ProgramServices>330342</ProgramServices>
        <ManagementAndGeneral>332637</ManagementAndGeneral>
        <Fundraising>29976</Fundraising>
      </OfficeExpenses>
      <InformationTechnology>
        <Total>1725997</Total>
        <ProgramServices>542937</ProgramServices>
        <ManagementAndGeneral>1183060</ManagementAndGeneral>
      </InformationTechnology>
      <Royalties>
        <Total>0</Total>
      </Royalties>
      <Occupancy>
        <Total>7010907</Total>
        <ProgramServices>31698</ProgramServices>
        <ManagementAndGeneral>6979209</ManagementAndGeneral>
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      <Travel>
        <Total>1248110</Total>
        <ProgramServices>987382</ProgramServices>
        <ManagementAndGeneral>244272</ManagementAndGeneral>
        <Fundraising>16456</Fundraising>
      </Travel>
      <TravelEntrtnmntPublicOfficials>
        <Total>0</Total>
      </TravelEntrtnmntPublicOfficials>
      <ConferencesMeetings>
        <Total>1143768</Total>
        <ProgramServices>829602</ProgramServices>
        <ManagementAndGeneral>297831</ManagementAndGeneral>
        <Fundraising>16335</Fundraising>
      </ConferencesMeetings>
      <Interest>
        <Total>9369</Total>
        <ManagementAndGeneral>9369</ManagementAndGeneral>
      </Interest>
      <PaymentsToAffiliates>
        <Total>0</Total>
      </PaymentsToAffiliates>
      <DepreciationDepletion>
        <Total>1219708</Total>
        <ProgramServices>834617</ProgramServices>
        <ManagementAndGeneral>385091</ManagementAndGeneral>
      </DepreciationDepletion>
      <Insurance>
        <Total>206379</Total>
        <ManagementAndGeneral>206379</ManagementAndGeneral>
      </Insurance>
      <OtherExpenses>
        <Description>MEMBER SOCIETY PASS THRU</Description>
        <Total>7501469</Total>
        <ProgramServices>7501469</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>EDIT MANAGEMENT</Description>
        <Total>4257321</Total>
        <ProgramServices>4257321</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>PUBLISHING PRINTING</Description>
        <Total>3642167</Total>
        <ProgramServices>3596454</ProgramServices>
        <ManagementAndGeneral>8136</ManagementAndGeneral>
        <Fundraising>37577</Fundraising>
      </OtherExpenses>
      <OtherExpenses>
        <Description>PUBLISHING PRODUCTION</Description>
        <Total>907304</Total>
        <ProgramServices>905407</ProgramServices>
        <ManagementAndGeneral>1897</ManagementAndGeneral>
      </OtherExpenses>
      <AllOtherExpenses>
        <Total>5298744</Total>
        <ProgramServices>4177055</ProgramServices>
        <ManagementAndGeneral>1083141</ManagementAndGeneral>
        <Fundraising>38548</Fundraising>
      </AllOtherExpenses>
      <TotalFunctionalExpenses>
        <Total>68535026</Total>
        <ProgramServices>46731688</ProgramServices>
        <ManagementAndGeneral>21338824</ManagementAndGeneral>
        <Fundraising>464514</Fundraising>
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      <CashNonInterestBearing>
        <BOY>6152890</BOY>
        <EOY>2765097</EOY>
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      <SavingsAndTempCashInvestments>
        <BOY>17644719</BOY>
        <EOY>21478941</EOY>
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      <PledgesAndGrantsReceivable>
        <BOY>99688</BOY>
        <EOY>205845</EOY>
      </PledgesAndGrantsReceivable>
      <AccountsReceivable>
        <BOY>11671369</BOY>
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      <ReceivablesFromOfficersEtc>
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        <EOY>1692</EOY>
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      <ReceivablesFromDisqualPersons>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </ReceivablesFromDisqualPersons>
      <OtherNotesLoansReceivableNet>
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        <EOY>0</EOY>
      </OtherNotesLoansReceivableNet>
      <InventoriesForSaleOrUse>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </InventoriesForSaleOrUse>
      <PrepaidExpensesDeferredCharges>
        <BOY>910440</BOY>
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      <LandBuildingsEquipmentBasis>21537735</LandBuildingsEquipmentBasis>
      <LandBldgEquipmentAccumDeprec>19518219</LandBldgEquipmentAccumDeprec>
      <LandBuildingsEquipmentBasisNet>
        <BOY>1242454</BOY>
        <EOY>2019516</EOY>
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      <InvestmentsPubTradedSecurities>
        <BOY>122504330</BOY>
        <EOY>141373409</EOY>
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      <InvestmentsOtherSecurities>
        <BOY>50000</BOY>
        <EOY>50000</EOY>
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      <InvestmentsProgramRelated>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </InvestmentsProgramRelated>
      <IntangibleAssets>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </IntangibleAssets>
      <OtherAssetsTotal>
        <BOY>7985513</BOY>
        <EOY>9110220</EOY>
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      <TotalAssets>
        <BOY>168262314</BOY>
        <EOY>181781228</EOY>
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      <AccountsPayableAccruedExpenses>
        <BOY>10372088</BOY>
        <EOY>7442125</EOY>
      </AccountsPayableAccruedExpenses>
      <GrantsPayable>
        <BOY>0</BOY>
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      </GrantsPayable>
      <DeferredRevenue>
        <BOY>19973071</BOY>
        <EOY>20448972</EOY>
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      <TaxExemptBondLiabilities>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </TaxExemptBondLiabilities>
      <EscrowAccountLiability>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </EscrowAccountLiability>
      <LoansFromOfficersDirectors>
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        <EOY>0</EOY>
      </LoansFromOfficersDirectors>
      <MortNotesPyblSecuredInvestProp>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </MortNotesPyblSecuredInvestProp>
      <UnsecuredNotesLoansPayable>
        <BOY>0</BOY>
        <EOY>0</EOY>
      </UnsecuredNotesLoansPayable>
      <OtherLiabilities>
        <BOY>19583132</BOY>
        <EOY>15556149</EOY>
      </OtherLiabilities>
      <TotalLiabilities>
        <BOY>49928291</BOY>
        <EOY>43447246</EOY>
      </TotalLiabilities>
      <FollowSFAS117>X</FollowSFAS117>
      <UnrestrictedNetAssets>
        <BOY>107547763</BOY>
        <EOY>123210851</EOY>
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      <TemporarilyRestrictedNetAssets>
        <BOY>3296146</BOY>
        <EOY>4514430</EOY>
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      <PermanentlyRestrictedNetAssets>
        <BOY>7490114</BOY>
        <EOY>10608701</EOY>
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      <TotalNetAssetsFundBalances>
        <BOY>118334023</BOY>
        <EOY>138333982</EOY>
      </TotalNetAssetsFundBalances>
      <TotalLiabNetAssetsFundBalances>
        <BOY>168262314</BOY>
        <EOY>181781228</EOY>
      </TotalLiabNetAssetsFundBalances>
      <InfoInScheduleOPartXI>X</InfoInScheduleOPartXI>
      <ReconcilationRevenueExpenses>10768661</ReconcilationRevenueExpenses>
      <ReconciliationUnrealizedInvest>9601180</ReconciliationUnrealizedInvest>
      <ReconcilationOtherChanges>-369882</ReconcilationOtherChanges>
      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>false</AccountantCompileOrReview>
      <FSAudited>true</FSAudited>
      <FSAuditedBasis>
        <FinancialStatementConsolidated>X</FinancialStatementConsolidated>
      </FSAuditedBasis>
      <AuditCommittee>true</AuditCommittee>
      <FederalGrantAuditRequired>false</FederalGrantAuditRequired>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA">
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        <CurrentTaxYearMinus3Years>648313</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>757520</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>1003190</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>3771663</CurrentTaxYear>
        <Total>9649375</Total>
      </GiftsGrantsContribReceived509>
      <GrossReceiptsFromAdmissions>
        <CurrentTaxYearMinus4Years>62041172</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>62683321</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>60815235</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>59434250</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>58729889</CurrentTaxYear>
        <Total>303703867</Total>
      </GrossReceiptsFromAdmissions>
      <GrossReceiptsFromNonUBI>
        <Total>0</Total>
      </GrossReceiptsFromNonUBI>
      <TaxRevLeviedForOrgBenefit509>
        <Total>0</Total>
      </TaxRevLeviedForOrgBenefit509>
      <ValueOfSvcsFcltsFurnishdByGovt>
        <Total>0</Total>
      </ValueOfSvcsFcltsFurnishdByGovt>
      <Total509>
        <CurrentTaxYearMinus4Years>65509861</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>63331634</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>61572755</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>60437440</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>62501552</CurrentTaxYear>
        <Total>313353242</Total>
      </Total509>
      <AmtsRecdFromDisqualPersons>
        <Total>0</Total>
      </AmtsRecdFromDisqualPersons>
      <AmtsFromSubstContributors>
        <Total>0</Total>
      </AmtsFromSubstContributors>
      <SupportFromDQPsEtc>
        <Total>0</Total>
      </SupportFromDQPsEtc>
      <PublicSupportTotal509>313353242</PublicSupportTotal509>
      <GrossInvestmentIncome509>
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        <CurrentTaxYearMinus1Year>4177709</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>4754933</CurrentTaxYear>
        <Total>21261559</Total>
      </GrossInvestmentIncome509>
      <Post1975UBTI>
        <Total>0</Total>
      </Post1975UBTI>
      <InvestmentIncomeAndUBTI>
        <CurrentTaxYearMinus4Years>5188383</CurrentTaxYearMinus4Years>
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        <CurrentTaxYearMinus1Year>4177709</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>4754933</CurrentTaxYear>
        <Total>21261559</Total>
      </InvestmentIncomeAndUBTI>
      <NetIncomeFromOtherUBI>
        <Total>0</Total>
      </NetIncomeFromOtherUBI>
      <OtherIncome509>
        <CurrentTaxYearMinus4Years>9806180</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>7706138</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>8752563</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>8988638</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>8626176</CurrentTaxYear>
        <Total>43879695</Total>
      </OtherIncome509>
      <TotalSupportTotal>
        <CurrentTaxYearMinus4Years>80504424</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>74068720</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>74434904</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>73603787</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>75882661</CurrentTaxYear>
        <Total>378494496</Total>
      </TotalSupportTotal>
      <PublicSupportPercentage509>0.82789</PublicSupportPercentage509>
      <PriorYearSupportPercentage>0.87790</PriorYearSupportPercentage>
      <InvestmentIncomePercentage>0.05617</InvestmentIncomePercentage>
      <PriorYrInvestIncomePercentage>0.06386</PriorYrInvestIncomePercentage>
      <ThirtyThreePercntTestsCY509>X</ThirtyThreePercntTestsCY509>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB">
      <ContributorInfo>
        <ContributorNumber>RESTRICTED</ContributorNumber>
        <ContributorNameBusiness>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorNameBusiness>
        <ContributorAddressUS>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorAddressUS>
        <AggregateContributions>RESTRICTED</AggregateContributions>
      </ContributorInfo>
    </IRS990ScheduleB>
    <IRS990ScheduleC documentId="IRS990ScheduleC">
      <TotalGrassrootsLobbying />
      <TotalDirectLobbying />
      <TotalLobbyingExpenditures />
      <OtherExemptPurposeExpenditures />
      <TotalExemptPurposeExpenditures />
      <LobbyingNontaxableAmount />
      <GrassrootsNontaxableAmount />
      <TotLobbyingGrassrootMinusNonTx />
      <TotLobbyExpendMnsLobbyingNontx />
      <Volunteers>true</Volunteers>
      <PaidStaffOrManagement>true</PaidStaffOrManagement>
      <MediaAdvertisements>false</MediaAdvertisements>
      <MailingsMembers>true</MailingsMembers>
      <PublicationsOrBroadcast>false</PublicationsOrBroadcast>
      <GrantsOtherOrganizations>false</GrantsOtherOrganizations>
      <DirectContactLegislators>true</DirectContactLegislators>
      <DirectContactLegislatorsAmount>183821</DirectContactLegislatorsAmount>
      <RalliesDemonstrations>true</RalliesDemonstrations>
      <OtherActivities>false</OtherActivities>
      <TotalLobbyingExpendituresIIB>183821</TotalLobbyingExpendituresIIB>
      <NotDescribedIn501c3>false</NotDescribedIn501c3>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="IRS990ScheduleD">
      <ArtPublicExhibitionAmts />
      <HeldWorksOfArtAmts />
      <CurrentYear>
        <BeginningOfYearBalance>18659786</BeginningOfYearBalance>
        <Contributions>3118587</Contributions>
        <InvestmentEarningsOrLosses>2532635</InvestmentEarningsOrLosses>
        <OtherExpenditures>263439</OtherExpenditures>
        <EndOfYearBalance>24047569</EndOfYearBalance>
      </CurrentYear>
      <CurrentYearMinus1Year>
        <BeginningOfYearBalance>19432716</BeginningOfYearBalance>
        <Contributions>24619</Contributions>
        <InvestmentEarningsOrLosses>-536268</InvestmentEarningsOrLosses>
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        <EndOfYearBalance>18659786</EndOfYearBalance>
      </CurrentYearMinus1Year>
      <CurrentYearMinus2Years>
        <BeginningOfYearBalance>17514715</BeginningOfYearBalance>
        <Contributions>63224</Contributions>
        <InvestmentEarningsOrLosses>2141240</InvestmentEarningsOrLosses>
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        <EndOfYearBalance>19432716</EndOfYearBalance>
      </CurrentYearMinus2Years>
      <CurrentYearMinus3Years>
        <BeginningOfYearBalance>14026715</BeginningOfYearBalance>
        <Contributions>99289</Contributions>
        <InvestmentEarningsOrLosses>3689029</InvestmentEarningsOrLosses>
        <OtherExpenditures>300318</OtherExpenditures>
        <EndOfYearBalance>17514715</EndOfYearBalance>
      </CurrentYearMinus3Years>
      <CurrentYearMinus4Years>
        <BeginningOfYearBalance>15206884</BeginningOfYearBalance>
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        <InvestmentEarningsOrLosses>-4103981</InvestmentEarningsOrLosses>
        <OtherExpenditures>224756</OtherExpenditures>
        <EndOfYearBalance>14026715</EndOfYearBalance>
      </CurrentYearMinus4Years>
      <BoardDesignatedEOYBalance>0.43000</BoardDesignatedEOYBalance>
      <PermanentEndowmentEOYBalance>0.44000</PermanentEndowmentEOYBalance>
      <TermEndowmentEOYBalance>0.13000</TermEndowmentEOYBalance>
      <EndowmentsHeldByUnrelatedOrgs>false</EndowmentsHeldByUnrelatedOrgs>
      <EndowmentsHeldByRelatedOrgs>false</EndowmentsHeldByRelatedOrgs>
      <Land />
      <Buildings />
      <LeaseholdImprovements>
        <OtherCostOrOtherBasis>2359902</OtherCostOrOtherBasis>
        <Depreciation>2149633</Depreciation>
        <BookValue>210269</BookValue>
      </LeaseholdImprovements>
      <Equipment>
        <OtherCostOrOtherBasis>15320202</OtherCostOrOtherBasis>
        <Depreciation>14323498</Depreciation>
        <BookValue>996704</BookValue>
      </Equipment>
      <OtherLandBuildings>
        <OtherCostOrOtherBasis>3857631</OtherCostOrOtherBasis>
        <Depreciation>3045088</Depreciation>
        <BookValue>812543</BookValue>
      </OtherLandBuildings>
      <TotalOfBookValueLandBuildings>2019516</TotalOfBookValueLandBuildings>
      <OtherAssets>
        <Description>INVESTMENT IN ACP</Description>
        <BookValue>9110220</BookValue>
      </OtherAssets>
      <TotalBookValueOtherAssets>9110220</TotalBookValueOtherAssets>
      <FederalIncomeTaxLiability>0</FederalIncomeTaxLiability>
      <OtherLiabilities>
        <Description>ACCRUED POSTRETIREMENT MEDICAL PLAN</Description>
        <Amount>13148655</Amount>
      </OtherLiabilities>
      <OtherLiabilities>
        <Description>DUE TO MEMBER SOCIETIES</Description>
        <Amount>2407494</Amount>
      </OtherLiabilities>
      <TotalOfAmounts>15556149</TotalOfAmounts>
      <Form990ScheduleDPartXIII>
        <Identifier>SUPPLEMENTAL INFORMATION</Identifier>
        <Explanation>PART V - THE ENDOWMENT FUNDS ARE FOR THE HISTORY CENTER, SOCIETY OF PHYSICS STUDENTS AND SPECIAL PROGRAMS WITHIN THE PHYSICS RESOURCES CENTER AT AIP. PART X - AIP's accounting policy for evaluating uncertain tax positions is to recognize tax positions if it is more-likely-than-not that the position would not be sustained upon examination by the IRS. AIP does not believe there are any unrecognized tax benefits or liabilities that should be recorded.</Explanation>
      </Form990ScheduleDPartXIII>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="IRS990ScheduleF">
      <GrantRecordsMaintained>true</GrantRecordsMaintained>
      <AcctsActvsOutUSTable>
        <Region>East Asia and the Pacific</Region>
        <NumberOfOffices>1</NumberOfOffices>
        <NumberOfEmployees>1</NumberOfEmployees>
        <TypeOfActivitiesConducted>Program Services</TypeOfActivitiesConducted>
        <SpecificServicesProvided>LIAISON OFFICE</SpecificServicesProvided>
        <TotalExpenditures>266141</TotalExpenditures>
      </AcctsActvsOutUSTable>
      <AcctsActvsOutUSTable>
        <Region>Europe (Including Iceland and Greenland)</Region>
        <TypeOfActivitiesConducted>Grantmaking</TypeOfActivitiesConducted>
        <SpecificServicesProvided>N/A</SpecificServicesProvided>
        <TotalExpenditures>26200</TotalExpenditures>
      </AcctsActvsOutUSTable>
      <SubtotalNumberOfOffices>1</SubtotalNumberOfOffices>
      <SubtotalNumberOfEmployees>1</SubtotalNumberOfEmployees>
      <TotalNumberOfOffices>1</TotalNumberOfOffices>
      <TotalNumberOfEmployees>1</TotalNumberOfEmployees>
      <SubtotalAmountSpent>292341</SubtotalAmountSpent>
      <TotalAmountSpent>292341</TotalAmountSpent>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>PHYSICS ACHIEVEMENTS</TypeOfAssistance>
        <Region>Europe (Including Iceland and Greenland)</Region>
        <NumberOfRecipients>3</NumberOfRecipients>
        <AmountOfCashGrant>26200</AmountOfCashGrant>
        <MannerOfCashDisbursement>CHECK</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <TransferToForeignCorp>true</TransferToForeignCorp>
      <InterestInForeignTrust>false</InterestInForeignTrust>
      <OwnForeignCorp>true</OwnForeignCorp>
      <PassiveForeignInvestCo>true</PassiveForeignInvestCo>
      <ForeignPartnership>false</ForeignPartnership>
      <BoycottCountries>false</BoycottCountries>
      <Form990ScheduleFPartV>
        <Identifier>SUPPLEMENTAL INFORMATION</Identifier>
        <Explanation>AIP HAS ESTABLISHED AND FOLLOWS DOCUMENTED POLICIES AND PROCEDURES TO MONITOR, EVALUATE AND REVIEW ALL TYPES OF GRANTS, AWARDS AND ASSISTANCE ON A REGULAR BASIS.</Explanation>
      </Form990ScheduleFPartV>
      <Form990ScheduleFPartV>
        <Identifier>SCHEDULE F, PART I, COLUMN F</Identifier>
        <Explanation>THE ACCOUNTING METHOD USED FOR THE EXPENDITURES SHOWN IS THE ACCRUAL BASIS.</Explanation>
      </Form990ScheduleFPartV>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI">
      <RecordsMaintained>true</RecordsMaintained>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>GEORGE WASHINGTON UNIVERSITY</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PO BOX 85</AddressLine1>
          <City>WASHINGTON</City>
          <State>DC</State>
          <ZIPCode>20055</ZIPCode>
        </AddressUS>
        <EINOfRecipient>530196584</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>30114</AmountOfCashGrant>
        <MethodOfValuation>N/A</MethodOfValuation>
        <DescriptionOfNonCashAssistance>N/A</DescriptionOfNonCashAssistance>
        <PurposeOfGrant>INTERN HOUSING</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>FERMILAB</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PO BOX 500</AddressLine1>
          <City>BATAVIA</City>
          <State>IL</State>
          <ZIPCode>60510</ZIPCode>
        </AddressUS>
        <EINOfRecipient>571239010</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>10000</AmountOfCashGrant>
        <MethodOfValuation>N/A</MethodOfValuation>
        <DescriptionOfNonCashAssistance>N/A</DescriptionOfNonCashAssistance>
        <PurposeOfGrant>PRESERVE DOCUMENTS</PurposeOfGrant>
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      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>LOWELL OBSERVATORY</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>1400 WEST MARS HILL RD</AddressLine1>
          <City>FLAGSTAFF</City>
          <State>AZ</State>
          <ZIPCode>86001</ZIPCode>
        </AddressUS>
        <EINOfRecipient>860098918</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>9600</AmountOfCashGrant>
        <MethodOfValuation>N/A</MethodOfValuation>
        <DescriptionOfNonCashAssistance>N/A</DescriptionOfNonCashAssistance>
        <PurposeOfGrant>PRESERVE DOCUMENTS</PurposeOfGrant>
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      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>The Huntington Library</BusinessNameLine1>
        </RecipientNameBusiness>
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          <AddressLine1>1151 Oxford Road</AddressLine1>
          <City>San Marino</City>
          <State>CA</State>
          <ZIPCode>91108</ZIPCode>
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        <MethodOfValuation>n/a</MethodOfValuation>
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        <PurposeOfGrant>Preserve Documents</PurposeOfGrant>
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        <AmountOfCashGrant>35871</AmountOfCashGrant>
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      <Form990ScheduleIPartIII>
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        <MethodOfValuation>N/A</MethodOfValuation>
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      <Form990ScheduleIPartIII>
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      <Form990ScheduleIPartIII>
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        <MethodOfValuation>FMV</MethodOfValuation>
        <DescriptionOfNonCashAssistance>SEE PART IV</DescriptionOfNonCashAssistance>
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        <Explanation>The non-cash assistance for the Science Writing Awards were an engraved chair and airline ticket.</Explanation>
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      <GeneralExplanation>
        <Identifier>990 CORE PART VI, LINE 12C</Identifier>
        <Explanation>EACH YEAR A CONFLICT OF INTEREST FORM IS COMPLETED BY ALL REQUIRED INDIVIDUALS. THE SECRETARY OF AIP REVIEWS AND EVALUATES IF THERE IS ANY CONFLICT OF INTEREST AND ITS IMPACT TO THE ORGANIZATION.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>990 CORE PART VI, LINE 15A</Identifier>
        <Explanation>ON AN ANNUAL BASIS AIP RETAINS A COMPENSATION CONSULTING FIRM TO REVIEW THE CURRENT COMPENSATION OF THE CEO, WHICH INCLUDES DETAILED COMPARISONS WITH COMPARABLY SIZED NOT-FOR-PROFIT ORGANIZATIONS AS WELL AS SELECTED PEER SCIENTIFIC AND ENGINEERING ORGANIZATIONS. THIS INFORMATION IS REVIEWED BY THE SECRETARY OF THE BOARD AND THE CHAIR OF THE GOVERNING BOARD OF AIP. THE CHAIR THEN DISCUSSES IT WITH THE EXECUTIVE COMMITTEE OF THE GOVERNING BOARD WHO MAKES THE FINAL DECISION OF THE COMPENSATION FOR THE CEO. A RECORD OF THE DISCUSSION AND COMPENSATION ACTIONS ARE RECORDED IN THE EXECUTIVE COMMITTEE MEETING MINUTES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>990 CORE PART VI, LINE 15B</Identifier>
        <Explanation>BIANNUALLY AIP RETAINS A COMPENSATION CONSULTING FIRM TO REVIEW THE CURRENT COMPENSATION OF THE OPERATING OFFICERS. THE REPORT INCLUDES DETAILED COMPARISONS WITH COMPARABLY SIZED NOT-FOR-PROFIT ORGANIZATIONS AND SELECTED PEER SCIENTIFIC AND ENGINEERING ORGANIZATIONS THIS INFORMATION IS REVIEW BY THE VICE PRESIDENT OF HUMAN RESOURCES AND CEO. THE CEO MAKES A RECOMMENDATION TO THE COMPENSATION COMMITTEE FOR APPROVAL. PERIODICALLY THIS PROCESS IS DONE FOR KEY EMPLOYEES AND IS REVIEWED AND APPROVED BY THE MANAGEMENT COMMITTEE. THE DELIBERATIONS ARE DOCUMENTED IN THE MINUTES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>990 CORE PART VI, LINE 19</Identifier>
        <Explanation>THE AIP WEBSITE HAS A GOVERNANCE SECTION THAT INCLUDES THE GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY. ALSO, ON THE WEBSITE ARE ANNUAL REPORTS THAT INCLUDE FINANCIAL HIGHLIGHTS FOR AIP.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>990 CORE PART XI, LINE 9</Identifier>
        <ReturnReference>OTHER CHANGES IN NET ASSETS OR FUND BALANCES:</ReturnReference>
        <Explanation>FASB ADOPTION POST RETIREMENT PLANS (369,882) ------------- TOTAL (369,882)</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>PHYSICS CONFERENCES INCORPORATED</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>ONE PHYSICS ELLIPSE</AddressLine1>
          <City>COLLEGE PARK</City>
          <State>MD</State>
          <ZIPCode>20740</ZIPCode>
        </AddressUS>
        <EIN>522205188</EIN>
        <PrimaryActivities>CONFERENCES</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>9</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>AIP</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>false</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>AMERICAN CENTER FOR PHYSICS</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>ONE PHYSICS ELLIPSE</AddressLine1>
          <City>COLLEGE PARK</City>
          <State>MD</State>
          <ZIPCode>20740</ZIPCode>
        </AddressUS>
        <EIN>521712905</EIN>
        <PrimaryActivities>BUILDING</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>11B</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NA</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>false</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartIV>
        <NameOfRelatedOrg>
          <BusinessNameLine1>AIP GLOBAL INC</BusinessNameLine1>
        </NameOfRelatedOrg>
        <AddressUS>
          <AddressLine1>ONE PHYSICS ELLIPSE</AddressLine1>
          <City>COLLEGE PARK</City>
          <State>MD</State>
          <ZIPCode>20740</ZIPCode>
        </AddressUS>
        <EIN>270602778</EIN>
        <PrimaryActivity>INTERNATIONAL</PrimaryActivity>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>AIP</BusinessNameLine1>
        </DirectControllingEntityName>
        <TypeOfEntity>C CORP</TypeOfEntity>
        <ShareOfTotalIncome>37594</ShareOfTotalIncome>
        <ShareOfEOYAssets>719840</ShareOfEOYAssets>
        <PercentageOwnership>1.00000</PercentageOwnership>
        <ControlledOrg>true</ControlledOrg>
      </Form990ScheduleRPartIV>
      <ReceiptOfIntAnnRentsRoyalties>false</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>false</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>false</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>false</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>false</LoansOrGuaranteesFromOtherOrg>
      <DividendsRelatedOrganization>false</DividendsRelatedOrganization>
      <SaleOfAssetsToOtherOrg>false</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>false</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>false</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>false</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>true</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>true</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>true</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>false</SharingOfFacilities>
      <SharingOfPaidEmployees>true</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>true</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>false</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>false</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>false</OtherTransferFromOtherOrg>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>AMERICAN CENTER FOR PHYSICS</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>K</TransactionType>
        <AmountInvolved>3257310</AmountInvolved>
        <MethodOfAmtDetermination>AGREEMENT</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>AIP GLOBAL INC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>L</TransactionType>
        <AmountInvolved>37431</AmountInvolved>
        <MethodOfAmtDetermination>AGREEMENT</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>AIP GLOBAL INC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>M</TransactionType>
        <AmountInvolved>20600</AmountInvolved>
        <MethodOfAmtDetermination>AGREEMENT</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>AMERICAN CENTER FOR PHYSICS</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>O</TransactionType>
        <AmountInvolved>945833</AmountInvolved>
        <MethodOfAmtDetermination>AGREEMENT</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>AIP GLOBAL INC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>P</TransactionType>
        <AmountInvolved>249540</AmountInvolved>
        <MethodOfAmtDetermination>AGREEMENT</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
    </IRS990ScheduleR>
  </ReturnData>
</Return>