BSM
- Baltimore Streetcar Museum
- Band Sergeant Major
- Bangladesh Society of Microbiologists
- Bata Shoe Museum
- Battery Sergeant Major
- Benilde-St. Margaret's
- Beyond the Standard Model
- Big Scary Monsters Recording Company
- Black Student Movement
- Black-Scholes-Merton formula
- Blind Spot Monitor
- Bloomingdale School of Music
- Blue Star Mothers
- Bovine Submaxillary Mucin Coatings
- Brick Squad Monopoly
- Britain's Strongest Man
- British School of Motoring
- Bronze Star Medal
- Budapest Semesters in Mathematics
- Business semantics management
- Business service management
- OpenBSM