| Abbreviation | Definition |
|---|---|
| BUMS | Bicycle United Motocross Society |
| BUR | Burbank - Glendale - Pasadena Airport |
| BUS | Belle Urban System |
| BUS | Belle Urban System, the transit agency serving Racine, Wisconsin |
| BUS | Brownsville Urban System |
| BUT | British United Traction |
| BUV | Basic Utility Vehicles |
| BV | Bombardier Vehicle |
| BVG | Berliner Verkehrs-Gesellschaft |
| BVR | Brighton Vehicle Rentals |
| BVR | Budget Vehicle Recovery |
| BVRLA | British Vehicle Rental and Leasing Agency |
| BVV | Birch Valley Vehicles |
| BWI | Baltimore - Washington International Airport |
| BWR | Beeps While Reversing |
| BWTS | Big White Taxi Service |
| BWY | Byway |
| BYBB | Backyard Boat Builders |
| C | Compact car |
| C&P | Conditions and Performance |