| Abbreviation | Definition |
|---|---|
| BRP | Billet Racing Products |
| BRP | British Racing Partnership |
| BRPA | Bacolod Racing Pigeon Association |
| BRR | Buck Rope Race |
| BRRS | Bertil Roos Racing School |
| BSCC | Bremerton Sports Car Club |
| BSCM | British Sports Car Meeting |
| BSRS | Bay State Race Services |
| BTAC | Buffalo Trace Antique Collection |
| BTM | Boost Turbo Management |
| BTR | Blood Type Racing |
| BTR | Brian Tooley Racing |
| BTRA | British Truck Racing Association |
| BVBCCI | Bella Vista Bronco Cross Country Invitational |
| BVR | Buena Vista Raceway |
| BWR | Barcelona World Race |
| BYRA | Bayview Yacht Racing Association (Australia) |
| BYRA | Blackwater Yacht Racing Association (Smith Mountain Lake, VA) |
| C&D | Car and Driver |
| CAPS | Can Am Pylon Society |