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      <PublicSupportCY509Pct>0.93089</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99368</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00121</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00084</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Schedule A, Part III, Line 12</FormAndLineReferenceDesc>
        <ExplanationTxt>Sale of soda cans to a recycler $80, Sales of soda at meetings $139, Sales of duplicate books $70</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="R000003" softwareId="22015720" softwareVersionNum="v1.00">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleO documentId="R000004" softwareId="22015720" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>Beverages at meeting $139, Soda cans for recycling $80 Sale of duplicate book donations $70. Revenue from the sale of donated books is reserved for support of the BSFS Library in accordance with GAAP requirements for accounting for collections. The BSFS Library is a collection and is not capitalized. - THE BSFS BOARD HAS ADOPTED THE CHANGES OF SFAS 116. THE COLLECTION OF BOOKS, PERIODICALS, AND MEDIA IS NOT CAPITALIZED OR AMORTIZED. PROCEEDS FROM ANY ITEMS THAT ARE DEACCESSIONS ARE USED FOR THE DIRECT CARE AND PRESERVATION OF THE COLLECTION. MATERIALS DONATED TO BSFS DO NOT BECOME PART OF THE COLLECTION UNTIL ACCEPTED AND CATALOGED. THOSE MATERIALS ARE PERSONAL PROPERTY WHICH BSFS PLACES IN ITS LITTLE FREE LIBRARY FOR USE BY THE GENERAL PUBLIC, SELLS TO RAISE REVENUE TO SUPPORT THE COLLECTION OR DONATES TO OTHER NONPROFIT ORGANIZATIONS WORKING TO PROMOTE GENERAL LITERACY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Awards to winners of writing contest winners $2023;Books for Compton Crook $125; Donations $600</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;Amount^Program Expenses;14905|Travel;10372|Rental;9211|Advertising;9301|Insurance;6370|Depreciation;4731|Facilities;4422|Information Technology;3581|Bank and Credit Card Fees;3514|Office Expenese;2569|Miscellaneous Expenses;1841^Total;70817^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>An error in a spreadsheet formula failed to include a line with a new capital project at the end of FY 2022. At that time Work in Progress for a mezzanine and wheelchair left was omitted when calculating the value of the property.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;EOY Amount^Equipment and Furnishing;29812|Depreciation on equipment and furnishings;-23170|Heinlein Silver Medals;720|Heinlein Silver Medals in progress;2000|Grants Receivable;6511|Inventory;3093^Total;18966^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>Maryland Sales Taxes - paid 12/2022 $2,128.07 Misc Accounts Payable $912.64</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part IV</FormAndLineReferenceDesc>
        <ExplanationTxt>BSFS IS AN ALL-VOLUNTEER RUN ORGANIZATION. THE 13 MEMBERS OF THE BOARD AND THE MANY HOURS OF SERVICE REPORTED IN THIS RETURN COULD NOT PRODUCE BALTICON. THE FOUR DAY FESTIVAL OF BOOKS, MUSIC, FILM, ART, AND DANCE WAS SUPPORTED BY A LOYAL CADRE OF AT LEAST 110 VOLUNTEERS (PLUS QUITE A FEW MORE WHO STATE THEY HAVE NOT TIME FOR MORE PAPERWORK TO REPORT THEIR HOURS). COLLECTIVELY THEY PROVIDED OVER 1300 HOURS OF WORK AT THE CONVENTION, AS WELL AS OVER 1000 HOURS IN THE MONTHS PRECEDING THE MEMORIAL DAY EVENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part V, Line 33</FormAndLineReferenceDesc>
        <ExplanationTxt>BSFS STARTED OPERATION OF A LITTLE FREE LIBRARY (LFL) TO MAKE BOOKS FREELY AVAILABLE TO MEMBERS OF THE PUBLIC FROM BOX IN FRONT OF OUR BUILDING IN EAST BALTIMORE. BSFS PUTS DONATED BOOKS OF DUPLICATES ALREADY IN OUR COLLECTIONS AND DONATIONS DESIGNATED FOR THE IN THE BOX. A PORTION OF THE PROCEEDS FROM THE BOOKS4KIDS FUNDRAISER IS USED TO PURCHASE SPANISH LANGUAGE CHILDREN'S BOOKS FOR THE LFL.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <ReasonableCauseExplanation documentId="R000005" softwareId="22015720" softwareVersionNum="v1.00">
      <ExplanationTxt>This filing is not late. An extension to file was filed and accepted on February 5, 2024</ExplanationTxt>
    </ReasonableCauseExplanation>
  </ReturnData>
</Return>