| Abbreviation | Definition |
|---|---|
| BFAR | Bridal Falls Air Races |
| BFR | Black Flame Racers |
| BFR | Bob Fill Racing |
| BGP | British Grand Prix |
| BHR | Black Halo Racing |
| BHRC | Bendigo Harness Racing Club |
| BHRC | British Harness Racing Club |
| BIR | Brainerd International Raceway |
| BJR | Brad Jones Racing |
| BKFR | Blontank kepanjen full racing |
| BLRC | British League of Racing Cyclists |
| BMMS | Brushy Mountain Motor Sports |
| BMR | Bill McAnally Racing |
| BMSO | Brive Moto Sport Organisation |
| BOR | BMW Oracle Racing |
| BORN | Broadcast Online Racing Network |
| BOWR | Biesbosch Open Water Race |
| BP | Baton Pass |
| BPRC | British Powerboat Racing Club |
| BQ | Boston Qualified |