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      <Desc>The Boston Public Library (BPL) is an extraordinary institution that has served the citizens of Boston since 1848. Founded as the first municipal library and the first public library to lend books, the Boston Public Library is dedicated to the advancement of learning and is "Free to All," as is carved in the facade of the historic McKim building in Copley Square. The BPL encompasses a Central Library, twenty-five vibrant neighborhood libraries, a robust website, and classes and programs for all ages. The Library's collection of more than 23 million items includes circulating books, eBooks, DVDs, and music, as well as research and special collections that encompass rare manuscripts, prints, photographs, drawings, maps, posters, and more. The Boston Public Library's Kirstein Business Library and Innovation Center, Norman B. Leventhal Map Center, and Collections of Distinction such as the personal library of John Adams, the Anti-Slavery collection, the Thomas Pennant Barton Collection of Shakespeare, and the Boston Pictorial Archive attract researchers and scholars from across the city and around the world. In fiscal year 2021, Boston Public Library hosted 4,299 public programs reaching 336,971 people, received 6.7 million visits to its website, and loaned 5.2 million items. Of those 5.2 million lends, more than 3.9 million were digital downloads of e-books and audiobooks. In the same fiscal year, the Boston Public Library helped 119,595 Massachusetts residents - adults, children, and teens - sign up for new library cards, hosted 9,490 free computer sessions, enabled 37,250 free wireless internet sessions, and had more than 384,519 visitors. Engaging the Public Through Programming + Active Spaces: The Library offers a variety of programs for all Children, teens and adults including: Future Readers Club, Homework Assistance, Local &amp; Family History, Writing programs, Theatre Productions, The Lowell Lecture Series, Copley Concerts, Never Too Late Programs, Children's Music and Storytelling. Serving the Public with Improving technology: BPL is a national leader in library service technology. The Library has been improving the Library's IT and business systems, increasing access to knowledge through the provision and creation of digital content, and closing the digital divide by providing the public improved access to the kinds of cutting edge technology that ensure equity. Restoring and Preserving our History: At an estimated one million manuscripts, holdings are particularly strong in medieval and early Renaissance manuscripts, colonial Boston and New England, and the American anti-slavery movement. The library is also home to hundreds of archival collections with strengths in local business, political, cultural, and social history. Caring for the Public's Special Collections The Library maintains and cares for of one the world's most important public collections of art, rare books, maps and other special objects and make these precious objects, owned by the public, accessible to patrons today and far into future generations. Statewide Collection Development &amp; Access: This program provides residents of the Commonwealth access to print, electronic, and downloadable collections not available in their individual libraries. Anyone who lives, works, goes to school, or owns property in Massachusetts can have a Boston Public Library card. Book Bundles - With patrons unable to enter branch libraries and browse for the books they needed, library staff quickly took to creating bundles of books based on genre, subject, and reading level to have on hand for circulation. For example, if a parent of a four-year old came to a branch and asked for some books for their child, the library could respond with a pre-selected bundle of books that could just be checked out. Similarly, if a patron wanted some dystopian science fiction and a few graphic novels, that could be supplied as well. Library staff created an innovative way to get patrons what they needed without necessitating in-person browsing. Craft Kits - Many of the programs geared toward children involved a craft. While librarians focused on incorporating simple crafts into their virtual storytimes that only necessitated basic household items, they also recognized that there was a need to provide materials for crafts, especially to households that might not have this type of material on-hand. Children's Librarians in branches have been creating kits with craft materials related to storytimes and distributing them through BPL to Go and at Storywalks around the City. Digital Equity Initiatives: As part of BPL to Go, the BPL's program of services available during the pandemic, BPL launched the Public Computer Access program, which allowed residents to sign up for a two-hour appointment to use library computers in a socially distanced space within the Central Library in Copley Square. At the same time, working with the Mayor's Office of New Urban Mechanics, BPL also expanded its Wi-Fi access to create the Outdoor Wi-Fi Program, providing 24-hour outdoor internet access at nine BPL branch locations across the city, allowing users to socially distance while accessing the Internet for free. BPL also created and rolled out Printing To Go, a free print-on-demand service, to all open BPL branches. Patrons can upload documents they need printed by filling out a form at bpl.org/printing-to-go, selecting their location, and picking up their print jobs 72 hours later at the branches, or 24 hours later at the Central Library in Copley Square. BPL's most recent expansion of its digital initiatives came with the recently launched Connectivity Kits. Connectivity Kits are designed to help patrons bridge the digital divide by providing free, reliable internet access in any location. The kits include a 14" Chromebook, a hotspot, and a mouse, as well as the necessary chargers and a quick start guide, all in a BPL bag for easy access and transportation. While the BPL continues to offer Public Computer Access at the Central Library in Copley Square, Connectivity Kits extend this service into patrons' homes and neighborhoods, on a schedule that works for them.</Desc>
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        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BEN BRADLEE JR</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>CHERYL CRONIN</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LINDA DORCENA FORRY</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN T HAILER</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JEFFREY B HAWKINS</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>CHYNAH TYLER</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>NAVJEET BAL effective January 2021</PersonNm>
        <TitleTxt>Trustee effective january 2021</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOSEPH BERMAN</PersonNm>
        <TitleTxt>Trustee effective january 2021</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOYCE LINEHAM</PersonNm>
        <TitleTxt>Trustee effective january 2021</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL RUSH</PersonNm>
        <TitleTxt>Trustee effective january 2021</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>CHRISTIAN WESTRA</PersonNm>
        <TitleTxt>Trustee effective january 2021</TitleTxt>
        <AverageHoursPerWeekRt>1</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>13662</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>1122199</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>229737</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>41</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Electronic Security Control Systems Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>108 Evergreen Street</AddressLine1Txt>
            <CityNm>Bridgeport</CityNm>
            <StateAbbreviationCd>CT</StateAbbreviationCd>
            <ZIPCd>06606</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Electronic security &amp; control systems provider</ServicesDesc>
        <CompensationAmt>184800</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Innovative Interfaces Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1900 Powell Street</AddressLine1Txt>
            <AddressLine2Txt>Suite 400</AddressLine2Txt>
            <CityNm>Emeryville</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94608</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Polaris Server Software Maintenance</ServicesDesc>
        <CompensationAmt>155255</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>EMCOR Service-North East dba Comm Air Balco</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>P O Box 845286</AddressLine1Txt>
            <CityNm>Boston</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>022845286</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>HVAC</ServicesDesc>
        <CompensationAmt>134043</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>G4S Secure Solutions (USA) Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>P O Box 277469</AddressLine1Txt>
            <CityNm>Atlanta</CityNm>
            <StateAbbreviationCd>GA</StateAbbreviationCd>
            <ZIPCd>303847469</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Security</ServicesDesc>
        <CompensationAmt>112544</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>American Service Company</PersonNm>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>35 Hanna Street</AddressLine1Txt>
            <CityNm>Quincy</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02169</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Fire Alarm Services</ServicesDesc>
        <CompensationAmt>109178</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>6</CntrctRcvdGreaterThan100KCnt>
      <InfoInScheduleOPartVIIIInd>X</InfoInScheduleOPartVIIIInd>
      <FederatedCampaignsAmt>0</FederatedCampaignsAmt>
      <MembershipDuesAmt>0</MembershipDuesAmt>
      <FundraisingAmt>10610</FundraisingAmt>
      <RelatedOrganizationsAmt>3092871</RelatedOrganizationsAmt>
      <GovernmentGrantsAmt>4037997</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>1473410</AllOtherContributionsAmt>
      <NoncashContributionsAmt>0</NoncashContributionsAmt>
      <TotalContributionsAmt>8614888</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>NETWORK MEMBERSHIP DUES</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>122454</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>122454</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </TotalOthProgramServiceRevGrp>
      <TotalProgramServiceRevenueAmt>122454</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>1364926</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>1364926</ExclusionAmt>
      </InvestmentIncomeGrp>
      <IncmFromInvestBondProceedsGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </IncmFromInvestBondProceedsGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>15863</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>15863</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <GrossRentsGrp>
        <RealAmt>90500</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>0</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>90500</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>90500</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>90500</ExclusionAmt>
      </NetRentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>37480067</SecuritiesAmt>
        <OtherAmt>0</OtherAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>31590625</SecuritiesAmt>
        <OtherAmt>0</OtherAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>5889442</SecuritiesAmt>
        <OtherAmt>0</OtherAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>5889442</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>5889442</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <ContriRptFundraisingEventAmt>0</ContriRptFundraisingEventAmt>
      <OtherRevenueMiscGrp>
        <Desc>Mcgovern Trust Fund Distribution</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>93346</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>93346</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>Recovered Fire Alarm/Security Expenses</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>54280</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>54280</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>Commissions(event $1,861,other $1748)</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>3609</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>3609</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>551</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>551</ExclusionAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>151786</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>16249859</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>122454</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>7512517</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <BenefitsToMembersGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
      </BenefitsToMembersGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </CompCurrentOfcrDirectorsGrp>
      <CompDisqualPersonsGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </CompDisqualPersonsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>3035902</TotalAmt>
        <ProgramServicesAmt>2550158</ProgramServicesAmt>
        <ManagementAndGeneralAmt>485744</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>77711</TotalAmt>
        <ProgramServicesAmt>65277</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12434</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>262194</TotalAmt>
        <ProgramServicesAmt>220243</ProgramServicesAmt>
        <ManagementAndGeneralAmt>41951</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>32500</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>32500</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesLobbyingGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>0</TotalAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesProfFundraising>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>272171</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>272171</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>955806</TotalAmt>
        <ProgramServicesAmt>802877</ProgramServicesAmt>
        <ManagementAndGeneralAmt>152929</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>35440</TotalAmt>
        <ProgramServicesAmt>29770</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5670</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>361450</TotalAmt>
        <ProgramServicesAmt>303618</ProgramServicesAmt>
        <ManagementAndGeneralAmt>57832</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>1309442</TotalAmt>
        <ProgramServicesAmt>1099931</ProgramServicesAmt>
        <ManagementAndGeneralAmt>209511</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>0</TotalAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>21220</TotalAmt>
        <ProgramServicesAmt>17825</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3395</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TravelGrp>
      <PymtTravelEntrtnmntPubOfclGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </PymtTravelEntrtnmntPubOfclGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>2998</TotalAmt>
        <ProgramServicesAmt>2518</ProgramServicesAmt>
        <ManagementAndGeneralAmt>480</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InterestGrp>
      <PaymentsToAffiliatesGrp>
        <TotalAmt>26193</TotalAmt>
        <ProgramServicesAmt>22002</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4191</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </PaymentsToAffiliatesGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>29183</TotalAmt>
        <ProgramServicesAmt>24514</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4669</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>44863</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>44863</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Books and related materials</Desc>
        <TotalAmt>1660370</TotalAmt>
        <ProgramServicesAmt>1660370</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
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        <ExplanationTxt>ITEM '1E' LABELED OTHER EXPENDITURES FOR FACILITIES AND PROGRAMS SHOWS DISTRIBUTION TO TRINITY CHURCH IN THE CITY OF BOSTON FOR CURRENT AND ALL PRIOR YEARS LISTED HERE.</ExplanationTxt>
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        <ExplanationTxt>ENDOWMENT FUNDS ARE USED TO SUPPORT THE ACTIVITIES AND PROGRAMS OF THE PUBLIC LIBRARY OF THE CITY OF BOSTON.</ExplanationTxt>
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        <CompensationBasedOnRltdOrgsAmt>122961</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>36548</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>13662</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>159509</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PRISCILLA FOLEY</PersonNm>
        <TitleTxt>Director Of Neighborhood Services</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>130042</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>41052</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>171094</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KURT MANSPERGER</PersonNm>
        <TitleTxt>Chief Technology Officer</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>136623</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>30612</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>167235</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ELLEN DONAGHEY</PersonNm>
        <TitleTxt>Chief Financial Officer (CFO)</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>139200</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>22685</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>161885</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION FOR CEO/EXECUTIVE DIRECTORS IS SET BY THE CITY OF BOSTON'S HUMAN RESOURCES DEPARTMENT</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="R000006" softwareId="20012124" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>COVID-19, WHICH BEGAN IN 2020, CONTINUES TO CAUSE THE INTERRUPTION OF SERVICES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>DUE TO THE COVID-19 OUTBREAK IN THE UNITED STATES IN 2020 AND 2021, THE LIBRARY HAD TO KEEP AS OF MARCH 2020 ALL ITS LOCATIONS CLOSED AND HAVE MOST OF THE STAFF WORK REMOTELY FROM HOME WHEN POSSIBLE TO DO SO. THIS MEANT THAT IN ORDER TO CONTINUE TO PROVIDE SERVICES TO THE PUBLIC, SERVICES HAD TO SHIFT ONLINE AND BE DELIVERED VIA OTHER CREATIVE MEANS. AS OF JUNE 2021 THE LIBRARY HAD BEGAN SLOWLY TO OPEN BY ALLOWING SOME STAFF BACK IN THE BUILDINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part V, Line 2a</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 498 LISTED HERE IS THE TOTAL # OF EMPLOYEES PAID UNDER THE LIBRARY DEPARTMENT FOR CALENDAR YEAR 2020. THE CITY OF BOSTON PROCESSES THE PAYROLL FOR THE LIBRARY AND FILES THE W-3 TRANSMITTAL OF WAGE AND TAX STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part V, Line 2b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CITY OF BOSTON PROCESSES THE LIBRARY'S ENTIRE PAYROLL. THEY ALSO FILE ALL THE REQUIRED FEDERAL EMPLOYMENT TAX RETURNS FOR THE LIBRARY UNDER THE CITY OF BOSTON FEDERAL ID.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 8a</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CLERK TAKES THE MINUTES OF ALL THE TRUSTEE MEETINGS AND COMMITTEE MEETINGS AND ONCE THE MINUTES ARE APPROVED THEY ARE POSTED ON THE LIBRARY'S WEBSITE: BPL.ORG.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CLERK TAKES THE MINUTES OF ALL THE TRUSTEE MEETINGS AND COMMITTEE MEETINGS AND ONCE THE MINUTES ARE APPROVED THEY ARE POSTED ON THE LIBRARY'S WEBSITE: BPL.ORG.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A DRAFT OF FORM 990 WAS PROVIDED TO THE GOVERNING BODY FOR REVIEW AND APPROVAL BEFORE IT WAS FILED. THIS FORM 990 IS PREPARED/REVIEWED/FILED BY THE ASSISTANT PRINCIPAL ACCOUNTANT. IT IS ALSO REVIEWED AND APPROVED BY THE SUPERVISOR OF ACCOUNTING AND THE CHIEF FINANCIAL OFFICER. ALL THE FINANCIAL NUMBERS LISTED ON THEM CORRESPONDS TO THE AUDITED FINANCIAL STATEMENT TOTALS. ACCOUNTING SCHEDULES HAVE BEEN CREATED TO BACK UP ALL THE DATA ENTERED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL EMPLOYEES ARE PROVIDED A SUMMARY OF THE CONFLICT OF INTEREST LAW AND MUST SIGN AND COMPLETE AN ACKNOWLEDGEMENT OF ITS RECEIPT AT TIME OF HIRE AND ANNUALLY THEREAFTER. ALSO, WITHIN THE FIRST 30 DAYS OF HIRE AND EVERY 2 YEARS THEREAFTER THEY ARE REQUIRED TO COMPLETE AN ONLINE TRAINING PROGRAM AT HTTP://WWW.MUNIPROG.ETH.STATE.MA.US/.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 14</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL PUBLIC ENTITIES ARE COVERED BY STATE LAW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION FOR OFFICERS AND KEY EMPLOYEES ARE SET BY THE CITY OF BOSTON'S HUMAN RESOURCES DEPARTMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE ON THE LIBRARY'S WEBSITE: BPL.ORG. ALL POLICIES INCLUDING THE CONFLICT OF INTEREST POLICY ARE AVAILABLE ON THE CITY'S HUB WHICH ALL EMPLOYEES HAVE ACCESS TO AND THEY ARE ALSO INCLUDED ON THE CITY OF BOSTON EMPLOYEE HANDBOOK.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VII, Section B, Line 1(C)</FormAndLineReferenceDesc>
        <ExplanationTxt>$ AMOUNTS LISTED FOR INDEPENDENT CONTRACTORS IS FOR CALENDAR YEAR 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 1c</FormAndLineReferenceDesc>
        <ExplanationTxt>MARATHON TEAM DONATIONS RECEIVED TOTALED $10,610. DUE TO COVID-19 THE BOSTON MARATHON DID NOT TAKEN PLACE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 1d</FormAndLineReferenceDesc>
        <ExplanationTxt>IN FY21 LISTED HERE AMOUNTS RECEIVED DIRECTLY FROM THE BOSTON PUBLIC LIBRARY FUND INC. $2,150,339 WHICH $226,193 IS FOR THE NORMAN B. LEVENTHAL MAP &amp; EDUCATION CENTER INC. AND FROM THE ASSOCIATES OF THE BOSTON PUBLIC LIBRARY INC. $942,532, GRAND TOTAL $3,092,871. PRIOR TO FY18 THESE WERE INCLUDED ON FORM 990 PART VIII STATEMENT OF REVENUE ITEM LINE 1F "ALL OTHER CONTRIBUTIONS..."</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 1f</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL OTHER CONTRIBUTIONS, GIFTS, GRANTS, AND SIMILAR AMOUNTS.... INCLUDES $692,332 FROM THE UNIVERSAL SERVICE SCHOOLS AND LIBRARIES PROGRAM, COMMONLY KNOWN AS "E-RATE". THESE $ SUPPORT THE OPERATING COSTS RELATED TO THE LIBRARY'S INFORMATION TECHNOLOGY INFRASTRUCTURE AND ARE PAID DIRECTLY TO THE LIBRARY'S VENDORS. THE E-RATE PROGRAM IS ADMINISTERED BY THE UNIVERSAL SERVICE ADMINISTRATIVE COMPANY UNDER THE DIRECTION OF THE FEDERAL COMMUNICATIONS COMMISSION (FCC). IN PAST YEARS THE LIBRARY HAS RECEIVED THIS SUPPORT, BUT FY2021 IS THE FIRST YEAR IT HAS BEEN INCLUDED ON THE LIBRARY'S AUDITED FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 2a - 2e</FormAndLineReferenceDesc>
        <ExplanationTxt>AMOUNT LISTED HERE $122,454 NEXT TO THE HEADING 'NETWORK MEMBERSHIP DUES' IS MEMBERSHIP DUES PAID BY OTHER ORGANIZATIONS WHOSE MEMBERS/PATRONS USE THE METRO BOSTON LIBRARY NETWORK SYSTEM (MBLN).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 5</FormAndLineReferenceDesc>
        <ExplanationTxt>LISTED HERE $0 BECAUSE THE CITY OF BOSTON PROCESSES AND PAYS FOR ALL OF THE LIBRARY'S PAYROLL EXPENDITURES TO ITS EMPLOYEES. THE LIBRARY THEN REIMBURSES THE CITY OF BOSTON A PORTION OF THE TOTAL PAYROLL EXPENDITURES PAID BY GIFTS &amp; GRANTS WHICH IS LISTED ON FORM 990 PART IX LINE 7.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 7</FormAndLineReferenceDesc>
        <ExplanationTxt>THE $ AMOUNT LISTED HERE IS THE PORTION OF THE TOTAL PAYROLL SALARY EXPENDITURES THE LIBRARY REIMBURSED THE CITY OF BOSTON.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>THE $ AMOUNT LISTED HERE IS THE PORTION OF PENSION BENEFITS THE LIBRARY REIMBURSED THE CITY OF BOSTON.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>THE $ AMOUNT LISTED HERE IS THE PORTION OF OTHER EMPLOYEE BENEFITS(HEALTH INSURANCE AND MEDICARE TAXES) THE LIBRARY REIMBURSED THE CITY OF BOSTON.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>LISTED HERE $0 FOR PAYROLL TAXES BECAUSE THE CITY OF BOSTON PROCESSES AND PAYS THIS EXPENSE FOR ALL LIBRARY EMPLOYEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 21</FormAndLineReferenceDesc>
        <ExplanationTxt>PAYMENTS TO AFFILIATES-$26,193 WAS PAID TO THE NORMAN B. LEVENTHAL MAP &amp; EDUCATION CENTER INC.. THIS MONEY CAME FROM THE BOSTON PUBLIC LIBRARY FUND INC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 23</FormAndLineReferenceDesc>
        <ExplanationTxt>INSURANCE TOTAL OF $44,863 CONSISTS OF CAR INSURANCE $31575, EXECUTIVES LIABILITY INSURANCE $9132 AND DISHONEST EMPLOYEE INSURANCE $4,156.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FEDERAL COMMUNICATIONS COMMISSION (FCC) "ERATE" PROGRAM HAS BEEN SUPPORTING THE OPERATING COSTS RELATED TO THE BOSTON PUBLIC LIBRARY'S INFORMATION TECHNOLOGY INFRASTRUCTURE. THIS MONEY IS PAID BY THE FCC DIRECLY TO BPL VENDORS AND IS INCLUDED IN THE BPL'S AUDITED FINANCIAL STATEMENTS. FOR BPL'S FISCAL YEAR 2021 $692,332 HAS BEEN PAID OUT TO BPL VENDORS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="R000007" softwareId="20012124" softwareVersionNum="v1.00">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>BOSTON PUBLIC LIBRARY FUND INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>700 BOYLSTON STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02116</ZIPCd>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>ASSOCIATES OF THE BOSTON PUBLIC LIBRARY INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>700 BOYLSTON STREET</AddressLine1Txt>
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          <ZIPCd>02116</ZIPCd>
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        <EIN>042900822</EIN>
        <PrimaryActivitiesTxt>FUNDRAISING FOR BPL</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
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          <BusinessNameLine1Txt>THE CITY OF BOSTON</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>ONE CITY HALL SQUARE</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02116</ZIPCd>
        </USAddress>
        <EIN>046011380</EIN>
        <PrimaryActivitiesTxt>CITY GOVERNMENT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>6</PublicCharityStatusTxt>
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      <GiftGrntCapContriFromOthOrgInd>1</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
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      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
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      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
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      <PerformOfServicesByOtherOrgInd>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
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      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
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          <BusinessNameLine1Txt>BOSTON PUBLIC LIBRARY FUND INC</BusinessNameLine1Txt>
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        <TransactionTypeTxt>c</TransactionTypeTxt>
        <InvolvedAmt>2150339</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>ACTUAL $</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>BOSTON PUBLIC LIBRARY FUND INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>n</TransactionTypeTxt>
        <InvolvedAmt>48046</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FAIR MARKET VALUE</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>ASSOCIATES OF THE BOSTON PUBLIC LIBRARY INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>c</TransactionTypeTxt>
        <InvolvedAmt>942532</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>ACTUAL $</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>ASSOCIATES OF THE BOSTON PUBLIC LIBRARY INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>n</TransactionTypeTxt>
        <InvolvedAmt>11139</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FAIR MARKET VALUE</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule R, Part V, Line 1c</FormAndLineReferenceDesc>
        <ExplanationTxt>Gift, Grant, or capital contribution to related organization(s)-The Boston Public Library received $ 2,150,339 from The Boston Public Library Fund Inc. and $ 942,532 from The Associates Of The Boston Public Library to support library operations. The Library operates as a separate department within the City Of Boston operations, with the City paying most of its costs. In fiscal year 2021 the Library's expenses it paid on its own totaled about 10 million and as a department of the City general fund about 39 million.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule R, Part V, Line 1n</FormAndLineReferenceDesc>
        <ExplanationTxt>Sharing of facilities, equipment, mailing lists, or other assets related with related organization(s)-The Boston Public Library provided at the Copley location free rent space to The Boston Public Library Fund Inc. with an estimated fair market value of $48,045.75 and to the Associates Of The Boston Public Library Inc. with an estimated fair market value of $11,139.00. Although not considered a related organization to the Library, The Norman B. Leventhal Map &amp; Education Center Inc. was also provided free rent space at the Copley location with an estimated fair market value of $163,630.50.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>