BEF
- BEF (image format)
- Belgian franc
- Benfleet railway station
- Bibliothèque des Ecoles françaises d'Athènes et de Rome
- Binary entropy function
- Black Eye Friday
- Bluefields Airport
- Bonus Army
- Bovine ephemeral fever
- Brazilian Expeditionary Force
- British Electric Foundation
- British Equestrian Federation
- British Expeditionary Force (World War I)
- British Expeditionary Force (World War II)