| Abbreviation | Definition |
|---|---|
| BW | Barbed Wire |
| BW | Biological Warfare |
| BW | Biological Weapon |
| BW | Broken Wing |
| BWC | Biological Weapon Convention |
| BWC | Biological Weapons Command |
| BWC | Biological Weapons Convention |
| BWCD | Ballistics Weapon Concept Division |
| BWCW | UnclassifiedTitle: Defining Alternatives for the BW/CW (Biological Warfare and Chemical Warfare) Def |
| BWIR | British West Indies Regiment |
| BWK | Belt Weather Kit |
| BX | Base Exchange |
| BX/PX | Base eXchange / Post eXchange |
| BY | Budget Year |
| BYOB | Bring Your Own Blood |
| BYOB | Bring Your Own Bullets |
| BYOB | Build Your Own Base |
| BYOM | Build Your Own Mortar |
| BYOR | Build Your Own Rifle |
| BYTE | Group of bits used to encode a single letter, number, or symbol |