BAF
- Baca language
- Bagram Airfield
- Balkan Air Force
- Bangladesh Air Force
- Baptistina family
- Barnes Municipal Airport
- Barrier-to-autointegration factor
- Basal area
- Belarus Athletic Federation
- Belgian Air Component
- Benefield Anechoic Facility
- Bolivian Air Force
- Bophuthatswana Air Force
- Brigade d'autodéfense du français
- British Academy of Fencing
- British Air Ferries
- British Armed Forces
- Building a Future
- Bulgarian Air Force
- Bunker adjustment factor
- Mass spectrometry data format
- Paphos
- SWI/SNF