| Abbreviation | Definition |
|---|---|
| IRAI | Independent Research Advisory Indonesia |
| ISA | Interoperability Standards Advisory |
| ISAB | Independent Scientific Advisory Board |
| ISAB | Information Systems Advisory Body |
| ISAB | International Scientific Advisory Board |
| ISAB | International Security Advisory Board |
| ISAB | International Student Advisory Board |
| ISAC | Invasive Species Advisory Committee |
| ISAT | International Security Advisory Team |
| ITAB | Industry Training Advisory Bodies |
| ITAB | Industry Training Advisory Body |
| ITAS | Israel Travel Advisory |
| IWAC | Industrial Waste Advisory Committee |
| JAAB | Joint Advisory Appeals Board |
| JAAC | Judicial Appointments Advisory Committee |
| JAB | Junior Advisory Board |
| JAC | Joint Advisory Committee |
| JACS | Jersey Advisory Conciliation Service |
| JADB | Joint Advisory Disciplinary Board |
| JAG | Joint Advisory Group |