| Abbreviation | Definition |
|---|---|
| ISN | Imperial Shmoigenese Navy |
| ISSP | Inter-Solar System Police |
| ITC | Instrumental TransCommunication |
| ITC | Integration Time Control |
| ITC | Intergalactic Trade Council |
| IU | Infinite Universe |
| IUE | Infinite Universe Engine |
| IVCA | Instant Visible Coins Across |
| IWP | Irate Warrior Persona |
| JA | Jedi Academy |
| JARVIS | Just A Rather Very Intelligent System |
| JASE | Jedi Academy Society of Excellence |
| JC | Janeway and Chakotay (Star Trek) |
| JC | Jedi Council |
| JCM | Jedi Council Member |
| JFK | Jungle From Kniteforce |
| JFRS | Joey: Future Rocket Scientist |
| JK | Jedi Knight |
| JKO | Jedi Knight Officer |
| JKO | Jedi Knight Outcast |