| Abbreviation | Definition |
|---|---|
| BAR | Browning Automatic Rifle |
| BAR | Browning Automatic Rifleman |
| BARB | British Army Recruit Battery |
| BARC | Barge Amphibious Resupply Community |
| BARC | Barge, Amphibious, Resupply, Cargo |
| BARK | Buckles, Anchor, Ropes, Knots |
| BAS | Ballistic Addon Studios |
| BAS | Baseline Assessment Strategy |
| BAS | Basic Allowance for Subsistence |
| BAS | Battalion Aid Station |
| BAS | Battlefield Automated System(s) |
| BASE | Behavioral Approach to Safety Enhancement |
| BASE | Brigade Automated Simulation Exercise |
| BASE-A | Brigade Automated Simulation Exercise - Apache |
| BASES | Beam Approach Seeker Evaluation System |
| BASH | Bird Aircraft Strike Hazard |
| BASOPS | Base Operations |
| BASS | Battlefield Area Surveillance System |
| BASS | Battlefield Automated Support System |
| BASS | Bradley Acquisition System Support |