| Abbreviation | Definition |
|---|---|
| IWA | Institute of World Affairs |
| IWASRI | International Waterlogging and Salinity Research Institute |
| IWB | Institute for Well Being |
| IWC | Institute War Clause |
| IWCH | Institute of Woman and Child Health |
| IWCH | Institute of Working Class History |
| IWD | Institute for Workplace Dynamics |
| IWE | Institute for Women's Empowerment |
| IWE | Institute for World Economics |
| IWE | Institute of Women's Excellence |
| IWE | The Institute of Water and Environment |
| IWES | Institute of Women and Ethnic Studies |
| IWES | Institute of Women Ethnic Studies |
| IWH | Institute for Work at Height |
| IWH | Institute for Work Health |
| IWI | International Worship Institute |
| IWII | International Wound Infection Institute |
| IWL | Institute for Women's Leadership |
| IWL | Institute for World Literature |
| IWL | Institute of World Languages |