| Abbreviation | Definition |
|---|---|
| JWAC | Joint Warfare Analysis Center |
| JWAG | Joint Warfighter Advisory Group |
| JWARN | Joint Warning and Reporting Network |
| JWARS | Joint Warfare Analysis and Requirements System |
| JWC | Joint Warfare Center |
| JWCA | Joint Warfighting Capabilities Assessment |
| JWFC | Joint Warfighting Center |
| JWG | Joint Working Group |
| JWICS | Joint Worldwide Intelligence Communications System |
| JWID | Joint Warfighting Integration Directorate |
| JWID | Joint Warfighting Interoperability Demonstration |
| JWID | Joint Warrior Interoperability Demonstration |
| JWIS | Joint Worldwide Military Command and Control Information System Program |
| JWO | Junior Watch Officer |
| JWP | Joint Working Party |
| JWV | Jewish War Veterans |
| JWVUS | Jewish War Veterans of the United States |
| JZ | Joint Zone |
| K | Kill |
| K | Killjoy |