| Abbreviation | Definition |
|---|---|
| BCS | Bethany Christian Services |
| BCS | Birmingham Computer Society |
| BCSPCA | British Columbia Society for the Prevention of Cruelty to Animals |
| BCYA | Baltimore City Yacht Association |
| BCYP | British Columbia Youth Parliament |
| BDA | British Diabetic Association |
| BDC | Bowhunters Defense Coalition |
| BDCC | Brattleboro Development Credit Corporation |
| BDDF | Body Dysmorphic Disorder Foundation |
| BDFM | Building Dreams For Marines |
| BDRC | Birth Defects Research For Children |
| BDSRA | Batten Disease Support and Research Association |
| BDVS | Brisbane Domestic Violence Service |
| BEA | Business Environment Association |
| BEARS | Bath Environmental and Animal Rights Society |
| BEAT | Breathe Easier Ark Tex |
| BEF | Biomass Energy Foundation |
| BEF | Boomer Esiason Foundation |
| BEF | British Electric Foundation |
| BEFA | British Electric Flight Association |