| Abbreviation | Definition |
|---|---|
| IIRSM | International Institute of Risk and Safety Management |
| IISc | Indian Institute of Science |
| IISP | Information Infrastructure Standards Panel |
| IISP | International Institute of Site Planning |
| IJA | International Jugglers Association |
| IJA | International Juggler's Association |
| ILA | Illinois Library Association |
| ILA | International Language Association |
| ILA | International Longshoremens Association |
| ILAR | International League Of Associations For Rheumatology |
| ILDA | International Laser Display Association |
| ILIA | Indiana Limestone Institute of America |
| ILM | Institute of Leadership Management |
| ILM | Institute of Leadership & Management |
| ILPMA | Israel Product Management Association |
| ILPS | International League of Peoples Struggle |
| ILPS | International Loss Prevention Systems |
| ILRI | International Livestock Research Institute |
| ILSI | Israel Life Science Industry |
| ILWU | International Labor Workers Union |