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      <ContractorCompensation>
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            <BusinessNameLine1>AMERICAN INSTITUTE OF PHYSICS</BusinessNameLine1>
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        <DescriptionOfServices>PUBLICATION SERVICES</DescriptionOfServices>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>CDW DIRECT LLC</BusinessNameLine1>
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          <AddressUS>
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            <City>CHICAGO</City>
            <State>IL</State>
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      <ContractorCompensation>
        <NameOfContractor>
          <NameBusiness>
            <BusinessNameLine1>ASAP PRINTING &amp; MAILING</BusinessNameLine1>
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          <AddressUS>
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            <City>ALEXANDRIA</City>
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        </AddressOfContractor>
        <DescriptionOfServices>PRINTING AND MAILING SERVICES</DescriptionOfServices>
        <Compensation>414942</Compensation>
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      <NumberOfContractorsGT100K>25</NumberOfContractorsGT100K>
      <GovernmentGrants>270270</GovernmentGrants>
      <AllOtherContributions>89694</AllOtherContributions>
      <TotalContributions>359964</TotalContributions>
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        <Description>PUBLICATIONS</Description>
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        <TotalRevenueColumn>18258496</TotalRevenueColumn>
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        <UnrelatedBusinessRevenue>192132</UnrelatedBusinessRevenue>
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      <ProgramServiceRevenue>
        <Description>MEETINGS</Description>
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      <ProgramServiceRevenue>
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      <GrantsToDomesticOrgs>
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      <GrantsToDomesticIndividuals>
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        <ProgramServices>146158</ProgramServices>
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      <FeesForServicesAccounting>
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      <FeesForServicesLobbying>
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        <ManagementAndGeneral>11303</ManagementAndGeneral>
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      <Occupancy>
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        <ManagementAndGeneral>892285</ManagementAndGeneral>
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        <ManagementAndGeneral>31722</ManagementAndGeneral>
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      <ConferencesMeetings>
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        <ManagementAndGeneral>5507</ManagementAndGeneral>
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        <ProgramServices>2437322</ProgramServices>
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      <OtherExpenses>
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      <OtherExpenses>
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      <OtherLiabilities>
        <Description>OTHER LIABILITIES</Description>
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        <DeferredCompFilingOrg>18220</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>17401</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>212597</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartIII>
        <ReturnReference>PART I, LINE 1B</ReturnReference>
        <Explanation>OSA 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 RECEIVES DISCOUNTED HOTEL, MEETING SPACE, AND CATERING FOR EVENTS HOSTED BY THE SOCIETY FOR ITS MEMBERS.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <ReturnReference>PART I, LINE 4B</ReturnReference>
        <Explanation>OSA'S CEO PARTICIPATES IN A 457(F) PLAN, WHICH IS INTENDED TO BE AN UNFUNDED AND NONQUALIFIED DEFERRED COMPENSATION PLAN AS DEFINED BY IN SECTION 457(F) (AND 409A AS MAYBE APPLICABLE) OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED, THE TERMS AND CONDITIONS. THE FUND IS DESIGNED TO PROVIDE SOCIETY'S HIGHLY COMPENSATED EMPLOYEES, WITH AN ANNUAL AMOUNT OF DEFERRED COMPENSATION. THE GENERAL TERMS AND CONDITIONS ARE AS FOLLOWS: 1. THE PLAN IS EFFECTIVE AS OF JANUARY 1, 2007 AND THE VESTING STARTS ON THE DATE OF THE EMPLOYMENT AGREEMENT, FEBRUARY 10, 2007. 2. THE SOCIETY MAINTAINS A SEPARATE ACCOUNT FOR THE PLAN PARTICIPANT. 3. ANNUAL AWARD, IF ANY, IS NO LESS THAN THE YEAR-END BONUS, WHICH SHALL BE CREDITED BY MARCH 31. 4. THE SOCIETY MAY RESERVE ASSETS IN ITS GENERAL ASSETS TO RECOGNIZE FUTURE PAYMENT OBLIGATIONS TO THE CEO AND THEY ARE GENERALLY INVESTED FOLLOWING THE SOCIETY'S LONG-TERM INVESTMENT PORTFOLIO STRATEGY. 5. THE PLAN ADMINISTRATOR IS THE COMMITTEE AND HAS THE COMPLETE DISCRETION TO SUPERVISE THE ADMINISTRATION OF THE PLAN. THE COMMITTEE HAS THE FINAL AUTHORITY IN DECISIONS ARISING ON THE INTERPRETATION AND THE IMPLEMENTATION OF THE PLAN. 6. NO RIGHT OR INTEREST IN THE PLAN IS ASSIGNABLE OR TRANSFERRABLE IN ANY MANNER. 7. THE PROVISIONS OF THIS PLAN ARE CONSTRUCTED AND INTERPRETED ACCORDING TO THE LAWS OF THE DISTRICT OF COLUMBIA TO THE EXTENT APPLICABLE AND NOT PREEMPTED BY FEDERAL LAW. THE TOTAL PAID FOR 2010 IS $62,500.</Explanation>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION A, LINE 4</Identifier>
        <Explanation>BOARD APPROVED THE ADDITION OF A NEW MEMBERSHIP CATEGORY TO BE KNOWN AS "SENIOR MEMBER".</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION B, LINE 11</Identifier>
        <Explanation>AFTER THE RETURN HAS BEEN PREPARED AND REVIEWED BY OSA STAFF AND THE AUDIT FIRM, THE AUDIT COMMITTEE OF THE BOARD OF DIRECTORS REVIEWS AND APPROVES THE FORM.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>CONFLICT OF INTEREST STATMENTS ARE REQUIRED EACH YEAR. THEY ARE REVIEWED AND APPROVED BY THE AUDIT COMMITTEE.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 15</ReturnReference>
        <Explanation>CEO COMPENSATION CEO COMPENSATION COMMITTEE IS COMPRISED OF THE PRESIDENT, PRESIDENT ELECT, PAST PRESIDENT AND THE TREASURER OF THE BOARD OF DIRECTORS. IN FEBRUARY OF EACH YEAR, THE CEO COMPENSATION COMMITTEE MEETS TO DETERMINE THE COMPENSATION FOR THE CEO BASED ON THE APPROVED PERFORMANCE METRICS FOR THE YEAR BY TAKING THE FOLLOWING STEPS: 1. THE COMMITTEE REVIEWS A SPECIALIZED REPORT PREPARED BY AN INDEPENDENT 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 SIMILAR NOT FOR PROFIT ORGANIZATIONS. 3. THE COMMITTEE USES THE HIGH-LEVEL DATA PROVIDED BY THE HUMAN RESOURCES DEPARTMENT TO DETERMINE IF AN INCREASE IS WARRANTED. 4. THE COMMITTEE APPROVED COMPENSATION IS DOCUMENTED AND COMMUNICATED TO THE CEO BY THE PRESIDENT OF THE BOARD OF DIRECTORS. IN ADDITION, THE COMMITTEE APPROVED CEO COMPENSATION IS DOCUMENTED AND COMMUNICATED TO THE SOCIETY'S HUMAN RESOURCES DEPARTMENT BY THE TREASURER OF THE BOARD. 5. COMPENSATION DECISIONS ARE DOCUMENTED AND KEPT IN CEO'S PERSONNEL FILES IN THE HUMAN RESOURCES DEPARTMENT. KEY EMPLOYEE COMPENSATION THE COMPENSATION COMMITTEE IS COMPRISED OF THE CHIEF EXECUTIVE OFFICER AND THE TREASURER OF THE BOARD OF DIRECTORS. IN DECEMBER OF EACH YEAR, THE COMPENSATION COMMITTEE MEETS TO DETERMINE THE COMPENSATION FOR KEY EMPLOYEES BASED ON THE APPROVED PERFORMANCE METRICS FOR THE YEAR BY TAKING THE FOLLOWING STEPS: 1. 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 SIMILAR NOT FOR PROFIT ORGANIZATIONS. 2. THE COMMITTEE USES THE HIGH-LEVEL DATA PROVIDED BY THE HUMAN RESOURCES DEPARTMENT TO DETERMINE IF AN INCREASE IS WARRANTED. 3. THE COMMITTEE APPROVED COMPENSATION IS DOCUMENTED AND COMMUNICATED TO THE KEY EMPLOYEE BY THE CEO. 4. COMPENSATION DECISIONS ARE DOCUMENTED AND KEPT IN KEY EMPLOYEES PERSONNEL FILES IN THE HUMAN RESOURCES DEPARTMENT.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 18</ReturnReference>
        <Explanation>THE FORM 1023 AND 990 ARE OPEN TO THE PUBLIC AN MADE AVAILABLE WHENEVER THEY ARE REQUESTED.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>THE GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE NOT MADE AVAILABLE TO THE PUBLIC.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>HOURS DEVOTED TO RELATED ORGANIZATION:</Identifier>
        <ReturnReference>FORM 990, PART VII, LINE 1A, COLUMN B</ReturnReference>
        <Explanation>NAME THE OSA FOUNDATION ELIZABETH A. ROGAN 5.0 STEPHEN D. FANTONE 5.0 TONY F. HEINZ 5.0 JAMES C. WYANT 5.0</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED GAINS ON INVESTMENTS: 4,660,676.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>OVERSIGHT OF AUDIT</Identifier>
        <ReturnReference>FORM 990, PART XII, LINE 2C</ReturnReference>
        <Explanation>THERE HAVE BEEN NO CHANGES DURING THE YEAR IN THE PROCESS FOR OVERSIGHT OF THE AUDIT OF THE FINANCIAL STATEMENTS.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>THE OSA FOUNDATION</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>2010 MASSACHUSETTS AVE NW</AddressLine1>
          <City>WASHINGTON</City>
          <State>DC</State>
          <ZIPCode>20036</ZIPCode>
        </AddressUS>
        <EIN>710913500</EIN>
        <PrimaryActivities>TO SUPPORT PHILANTHROPIC ACTIVITIES THAT FORWARD OSA'S MISSION.</PrimaryActivities>
        <LegalDomicileState>DC</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>509(A)(3)</PublicCharityStatus>
        <DirectControllingEntityNA>N/A</DirectControllingEntityNA>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>0</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>1</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>0</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>0</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>0</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>0</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>0</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>0</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>0</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>0</SharingOfFacilities>
      <SharingOfPaidEmployees>0</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>0</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>0</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>0</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>0</OtherTransferFromOtherOrg>
    </IRS990ScheduleR>
  </ReturnData>
</Return>