ISJ
| Acronym | Definition |
|---|---|
| ISJ | Idaho State Journal (magazine) |
| ISJ | Inspectoratul Scolar Judetean (Romanian: County School Inspectorate) |
| ISJ | Inside Joke (internet chat) |
| ISJ | Investor Services Journal |
| ISJ | Ichthyological Society of Japan (research organization; Tokyo, Japan) |
| ISJ | Internet Science Journal |
| ISJ | Information System Journal |