| Abbreviation | Definition |
|---|---|
| BCY | British Columbia and Yukon |
| BCYP | British Columbia Youth Parliament |
| BD | British Dressage |
| BDA | British Drilling Association |
| BDAM | British Digital Asset Management |
| BDBJ | Board of Deputies of British Jews |
| BDC | British Drift Championship |
| BDDG | British Doctors and Dentists Group |
| BDF | British Drilling and Freezing |
| BDFF | British Documentary Film Festival |
| BDHC | British Deputy High Commission |
| BDO | British Darts Organization |
| BDRA | British Drag Racing Association |
| BDRS | British Double Reed Society |
| BDRT | British Discovery Rally Team |
| BDSC | British Deaf Sports Council |
| BDSL | British Downhill Skateboarding League |
| BDST | British Double Summer Time |
| BDTC | British Dependant Territories Citizenship |
| BDTC | British Dependent Territories Citizen |