| Abbreviation | Definition |
|---|---|
| BCRD | Basic Consolidated Requirements Document |
| BCRT | Binary Code Range Time |
| BCT | Bus Configuration Table |
| BCU | Bus Control Unit |
| BD | Binary Decoder |
| BD | Binary Digit |
| BD | Binary Discrete |
| BD | Board |
| BD | Radio-frequency Band |
| BDA | Backup Drive Amplifier |
| BDA | Bermuda Tracking Station (Spaceflight Tracking and Data Network) |
| BDA | Blast Danger Area |
| BDC | Baseline Data Collection |
| BDC | Bi-Directional Converter |
| BDCF | Baseline Data Collection Facility |
| BDCR | Baseline Document Change Request |
| BDD | Baseline Definition Document |
| BDR | Battery Discharge Regulator |
| BDR | Big Dumb Rocket |
| BDRT | BFS (Backup Flight System) Discrepancy Report Tracking |