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Out of curiosity I googled "BPL" and "library" and found numerous libraries which either have "BPL" somewhere in their URL or refer to themselves as "BPL" somewhere on their website. The following are from just the first few pages of Google search results - I'm sure there must be many more.

www.bpl.lib.me.us/
www.mybpl.org
www.bplonline.org/
www.bpl.bc.ca/
www.bpl.us/
https://www.bpl.on.ca/
http://www.billingslibrary.org/356/MY-BPL
http://bportlibrary.org/bpl-library-card-applications/
http://www.bettendorflibrary.com/rea...w-items-at-bpl
http://www.burlington.lib.ia.us/311/...-Library-Board
http://www.bienvillelibrary.org/About-BPL.html
https://www.laserfiche.com/feature/b...s-library-bpl/
http://www.bozemanlibrary.org/news/news.php?newsID=710
http://www.benzonialibrary.org/history-of-bpl.html