| Abbreviation | Definition |
|---|---|
| BSTAR | Battlefield Surveillance Target Acquisition Radar |
| BSTF | Baltic Sea Task Force |
| BSTING | Ballistic Sight Technology for Improving Night/Day Gunnery |
| B-STING | Beam Sight Technology |
| BSTS | Boost Surveillance and Tracking System |
| BSU | Blood Supply Unit |
| BSU | Bomb Stabilization Unit |
| BT | Basic [Military] Training |
| BT | Basic Training |
| BT | Battalion Training (or Terminal) |
| BT | Battle Target |
| BT | Begin Text |
| BT | Big Tank |
| BT | Bloody Terrible |
| BT | Bloody Traitors |
| BTA | Best Technical Approach |
| BTB | Believed-To-Be |
| BTC | been to clinic |
| BTC | Best Technical Course |
| BTC | Biochemical Test Coordinator |