BSF

• Ballerup-Skovlunde Fodbold, a Danish football club
• British Skin Foundation, a UK charity raising money for skin disease and skin cancer research
• Bibliothèques Sans Frontières, an international non profit
• Bible Study Fellowship, an international Christian organisation
• United States – Israel Binational Science Foundation
• Biosciences Federation, a UK life science organisation
• Border Security Force, Indian federal border patrol agency
• Brandy Station Foundation, an organization devoted to preserving a battle site in Virginia, United States
• British Softball Federation, the National Governing Body of softball within the UK
• Bund Schweizerischer Frauenvereine, Swiss national federation of women's organizations

• Basilar skull fracture, a head injury
• Biosand filter, water filtration technique
• Black Soldier Fly, a larva used in permaculture

• Bean Scripting Framework, software to integrate the Java programming language with other scripting languages
• Bit Scan Forward, an x86 instruction used to find the least significant bit set in a binary word
• Bootstrapping Server Function part of GAA/GBA Generic Bootstrapping Architecture

• Black Sea Fleet, the fleet of the Russian Navy in the Black Sea
• Black Sea Forum for Partnership and Dialogue, regional forum first held in 2006
• Hard bolívar, abbreviated BsF or Bs.F, the currency of Venezuela from 2008 to 2018
• Boysetsfire, an American post-hardcore rock band
• Bradshaw Army Airfield, with IATA airport code BSF
• British Standard Fine, an imperial-unit based screw-thread standard
• Building Schools for the Future, a British Government initiative to rebuild schools, from 2004 to 2010
• BSF (time service), Taiwan's time signal
• Segelföreningen i Björneborg, Finnish yacht club

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