| Abbreviation | Definition |
|---|---|
| BEAR | Bring Everything, Always Ready |
| BEAST | Basic Emulation and Simulation Training |
| BEAST | Basic Expeditionary Airman Skills Training |
| BEB | Brigade Engineer Battalion |
| BEC | Battery Elimination Circuit |
| BEE | Bioenvironmental Engineering Officer |
| BEEF | Base Emergency Engineer Force |
| BEEF | Base Engineer Emergency Force |
| BEEF | Big Explosives Experimental Facility |
| BEEM | Blast Effects Estimation Model |
| BEER | Bradley Engineering Efficient Re-design |
| BEF | Belgian Elite Force |
| BEF | British Expeditionary Force |
| BEG | Budget Estimate Guidance |
| BEL | Behind Enemy Lines |
| BELCAP | Battlefield Electromagnetic Cover and Deception |
| BELDWSS | Battlefield Environmental Laser Designator |
| BELFAST | Behind Enemy Lines Field Assault Sabotage Teams |
| BEM | Blade Element Model |
| BEMT | Basic Electronics Maintenance Trainer |