| Abbreviation | Definition |
|---|---|
| ISJ | in Search of Justice |
| ISJ | Inclusion Social Justice |
| ISJ | Internationale In Search of Justice |
| ISJ | Issues in Social Justice |
| ISJA | Indigenous Social Justice Association |
| ISJC | Interfaith Social Justice Collaborative |
| ISJC | International Social Justice Commission |
| ISLG | Idaho Senior Legal Guidebook |
| ISLG | Investor State Law Guide |
| ISLN | International Standard Lawyer Number |
| ISLP | International Senior Lawyers Project |
| ISLT | In School Law and Trade |
| ISO | Intensive Supervision Order |
| ISO | International Standards of Operations |
| ISPL | Institute of Space Policy and Law |
| ISR | Illegal Street Racer |
| ISR | Illegal Street Racing |
| ISS | Imposition of Sentence Suspended |
| ISSI | In Space Soldering Investigation |
| IST | Inddiethumpers Standard Time |