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        <PersonNm>Chad Stark</PersonNm>
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        <PersonNm>Philip St J Russell</PersonNm>
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      <TotalRevEtcAuditedFinclStmtAmt>44608720</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>6820467</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>0</DonatedServicesAndUseFcltsAmt>
      <RecoveriesPriorYearGrantsAmt>0</RecoveriesPriorYearGrantsAmt>
      <OtherRevenueAmt>144962</OtherRevenueAmt>
      <RevenueNotReportedAmt>6965429</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>37643291</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>0</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>0</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>37643291</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>36058179</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>0</DonatedServicesUseFcltsAmt>
      <PriorYearAdjustmentsAmt>0</PriorYearAdjustmentsAmt>
      <LossesReportedAmt>0</LossesReportedAmt>
      <OtherExpensesIncludedAmt>144962</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>144962</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>35913217</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>0</InvestmentExpensesNotIncld2Amt>
      <OtherExpensesNotIncludedAmt>0</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>35913217</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>OSA is exempt from income tax under Section 501(c)(3) of the Internal Revenue Code and is exempt from District of Columbia income taxes. In addition, OSA has been determined by the Internal Revenue Service not to be a private foundation. However, OSA is required to report unrelated business income to the Internal Revenue Service, The District of Columbia, and the state of California and New York. In addition, OSA is not a private foundation as defined in section 509(a) of the Internal Revenue Code. OSA's source of unrelated business income consists of advertising income. No provision for income taxes has been made at December 31, 2013 and 2012 as expenses offset income. OSA follows guidance in ASC 740-10, whereby an organization must recognize the tax benefit associated with the tax positions taken for tax return purposes when it is more-likely than not that the position will be sustained. OSA does not believe there are any material uncertain tax positions and accordingly, will not recognize any liability for unrecognized tax benefits. OSA has filled for and received income tax exemptions in the jurisdictions where they are required to do so. Additionally, OSA has filed Internal Revenue Form 990 tax returns as required and all applicable returns in those jurisdictions, where they are required. OSA is not subject to U.S. federal, state and local, or non-U.S. income tax examinations for the years 2009 and earlier. However, OSA is still open to examination by tax authorities from fiscal year 2010 forward. For the years ended December 31, 2013 and 2012, there were no interest or penalties recorded in the consolidating statements of activities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XI, Line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental expenses - $144,963</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XII, Line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>Rent Expense</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Individual and Meeting support</SpecificServicesProvidedTxt>
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      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>3</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Scientific Education</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>34825</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
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        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Individual and meeting support</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (including Iceland and Greenland)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>6</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Scientific Education</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
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        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Individual and meeting support</SpecificServicesProvidedTxt>
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      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
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        <SpecificServicesProvidedTxt>Individual and Meeting support</SpecificServicesProvidedTxt>
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        <SpecificServicesProvidedTxt>Individual and meeting support</SpecificServicesProvidedTxt>
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        <RegionTxt>Europe (including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Conference support</PurposeOfGrantTxt>
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      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Youth education grants</TypeOfAssistanceTxt>
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      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>Student Section grants</TypeOfAssistanceTxt>
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      <ForeignIndividualsGrantsGrp>
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      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>All financial awards, whether distributed within the USA or internationally, are disbursed based on established policies. All US and international financial award recipients are required to file a final report with the Society.</ExplanationTxt>
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          <City>Washington</City>
          <State>DC</State>
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        <ExplanationTxt>All financial awards, whether distributed within the USA or internationally, are disbursed on established policies. All US and international financial rewards recipients are required to file a final report with the Society.</ExplanationTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Elizabeth A Rogan</PersonNm>
        <TitleTxt>Chief Executive Officer</TitleTxt>
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        <PersonNm>Chad Stark</PersonNm>
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        <PersonNm>Sean Bagshaw</PersonNm>
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        <PersonNm>Melissa Russell</PersonNm>
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        <PersonNm>Thomas Hausken</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>OSA CEO is a member of the private Cosmos Club in Washington, DC. The initiation fee for the club was paid by the CEO's personal funds. Annual dues for the club membership are reimbursed by the Society, which in return receives discounted hotel, meeting space, and catering for events hosted by the Society.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1b</FormAndLineReferenceDesc>
        <ExplanationTxt>OSA's CEO is a member of the private Cosmos Club in Washington, DC. The initiation fee for the club membership was paid by the CEO's personal funds. Annual dues for the club membership are reimbursed by the Society, which in return received discounted hotel, meeting space, and catering for events hosted by the Society.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>After the return has been prepared and reviewed by OSA Staff, the Audit Committee of the Board of Directors, reviews and approves the form. Once approved the form is provided to the Board of Directors.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Conflict of Interest statements are required each year. They are reviewed and approved by the Audit Committee.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>CEO Compensation: The CEO Compensation Committee is comprised of the officers of the Board of Directors. In February of each year, the CEO Compensation Committee meets to determine the compensation for the CEO based on approved performance metrics. 1. The Committee reviews a specialized report prepared by an independant source. 2. Additional compensation data is provided by the Human Resources Department using multiple salary surveys, prepared by independent sources and compensation information disclosed in the 990's of similiar not for profit organizations.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The governing documents, conflict of interest policy and financial statements are not made available to the public.</ExplanationTxt>
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