| Abbreviation | Definition |
|---|---|
| IIMCH | Chilean Institute of Mining Engineers |
| IIMCH | Instituto de Ingenieros de Minas de Chile |
| IIR | Institut International du Froid |
| IIR | International Institute of Refrigeration |
| IIRS | Inclusive Innovative And Reflective Societies |
| IIS | Institute of Information Scientists |
| IIS | International Insurance Society |
| IIS | International Isotope Society |
| IISA | Institut International des Sciences Administratives |
| IISA | International Institute of Administrative Sciences |
| IISH | International Institute for Society and Health |
| IISI | International Iron and Steel Institute |
| IISS | International Image Sensor Society |
| IITS | International Intradiscal Therapy Society |
| IJCS | International Journal of Childhood and Society |
| IJCS | International Journal of Communication and Society |
| IJLS | Immigrant Justice Law Society |
| IJMS | International Journal on Multicultural Societies |
| IKM | Institut Kimia Malaysia |
| IKM | Malaysian Institute of Chemistry |