BFS
- BFS Group
- Basic feasible solution
- Basketball Federation of Slovenia
- Be File System
- Beatles for Sale
- Belfast International Airport
- Beltane Fire Society
- Benign fasciculation syndrome
- Best-first search
- Bibby Financial Services
- Big Falcon Ship
- Bio Fuel Systems
- Blow fill seal
- Boot File System
- Bournemouth Film School
- Bowling for Soup
- Brain Fuck Scheduler
- Breadth-first search
- British Fantasy Society
- Brooklyn Friends School
- Bundesamt für Strahlenschutz
- Bureau of the Fiscal Service
- Busan Foreign School
- Federal Statistical Office (Switzerland)