| Abbreviation | Definition |
|---|---|
| ATE | Active Time Event |
| ATR | Adventure Tour Race |
| ATUM | Address Tracing Using Microcode |
| AVRG | Arkansas Valley Race Group |
| AWD | Average Winning Distance |
| AWR | Anthony Woodford Racing |
| BAR | British American Racing |
| BARC | British Automobile Racing Club |
| BBR | Better Barrel Races |
| BBR | Blues Brothers Racing |
| BBTB | Big Bore Throttle Body |
| BCCR | Boys Cross Country Regionals |
| BCRA | Bay Cities Racing Association |
| BDBRA | British Dragon Boat Racing Association |
| BDP | Bracelet De Ployant |
| BDR | Black Diamond Racing |
| BDRA | British Drag Racing Association |
| BDTS | Battery Data Tracing System |
| BEARS | British European American Racing Series |
| BECG | Bracebridge Emergency Control Group |