| Abbreviation | Definition |
|---|---|
| ITUC | International Trade Union Confederation |
| IUWG | Inter Utility Working Group |
| IUWG | International Utilities Working Group |
| IUYWG | International Union Youth Working Group |
| IWG | Innovation Working Group |
| IWG | Interim Working Group |
| JCMWG | Joint Civil Military Working Group |
| JCMWG | Joint Continuous Monitoring Working Group |
| JCWG | Joint Committee Working Group |
| JCWG | Joint Competency Working Group |
| JCWG | Joint Croatian Working Group |
| JPWG | Jini Printing Working Group |
| JPWG | Joint Partnership Working Group |
| JPWG | Joint Precipitation Working Group |
| JPWG | Joint Program Working Group |
| JPWG | Joint Protocol Working Group |
| JSPTIPWG | Joint Services Physical Training Injury Prevention Work Group |
| JWG | Jurisdictional Working Group |
| KFC | Keep Fighting Communism |
| LAGG | Latin America Guerrilla Groups |