- J -
| Abbreviation | Meaning |
|---|---|
| J | Jewish |
| JABCA | Joint Atomic, Biological and Chemical Defensive Warfare School |
| JAG | Judge Advocate General |
| JAN | Joint Army & Navy Radio Procedure |
| JATP | Joint Air Training Plan |
| JEW | Jewish |
| JFHQ | Joint Force Headquarters |
| JIMRTTRG | Job Inspector Mechanical Relations Transportation Training |
| JINSTOR | Job Instructor |
| JIX | Unclassified Ships (U.S) |
| JLS | Japanese Language School |
| JLS | Junior Leader's School |
| JLTC | Junior Leader's Training Centre |
| JMC | Johnson Method of Coaching |
| JMHRCAMC | Joliette Military Hospital, Royal Canadian Army Medical Corps |
| JMT | Job Methods Training |
| Joiner | Joiner |
| JP | Joint Planners |
| JR | Joliette Regiment |
| JRT | Job Relations Training |
| JSC | Joint Services Committee |
| JSM | Joint Staff Mission |
| JSU | Junior Sergeant |
| JTC | Jasper Training Camp |
| JTF2 | Joint Task Force 2 |
| JWEC | Junior War Establishments Committee |
| JWPS | Joint War Production Staff |