| Abbreviation | Definition |
|---|---|
| BFCS | Back-up Flight Control System |
| BFL | Back Focal Length |
| BFL | Bakersfield, California, TACAN Station |
| BFO | Beat Frequency Oscillator |
| BFO | Blood-Forming Organs |
| BFRC | Big Frigging Red Cloud |
| BFRP | Boron Fiber Reinforced Plastic |
| BFS | Backup Flight System |
| BFUSD | Baseline and Follow Up Survey Data |
| BFWOT | Big Freaking Waste Of Time |
| BFZES | Breadboard Float Zone Experiment System |
| BH/MP | Breather Hose/MouthPiece |
| BHD | BulkHeaD |
| BHN | Brinell Hardness Number |
| BHP | Brake HorsePower |
| BHR | Big Honkin Rocket |
| BHS | Base Heat Shield |
| BI0-L | Biphase - Level |
| BIA | Bus Interface Adaptor |
| BIN | Business and Information Network |