| Acronym | Definition |
|---|
| IIAP | Instituto de Investigaciones de la Amazonia Peruana (Spanish: Research Institute of Peruvian Amazonia) |
| IIAP | Indian Institute of Astrophysics (Koramangala, Bangalore, India) |
| IIAP | Institut International d'Administration Publique (French: International Institute of Public Administration) |
| IIAP | Institute for Informatics and Automation Problems (est. 1957; National Academy of Sciences of the Republic of Armenia) |
| IIAP | Insurance Institute for Asia and the Pacific, Inc. (Phillipines) |
| IIAP | ISS Independent Assessment Panel |
| IIAP | IMEC (Interuniversity Microelectronics Centre) Industrial Affiliation Program (est. 1991) |