| Acronym | Definition |
|---|
| IEHS➣Institute of Environmental Health Sciences |
| IEHS➣Immigration and Ethnic History Society (est. 1965; various locations) |
| IEHS➣Intensive English High School (Australia) |
| IEHS➣Institute for Environment and Human Security (UN) |
| IEHS➣International Endo Hernia Society (est. 2004; Greece) |
| IEHS➣IBM (International Business Machines) Eclipse Help System (software) |