| Acronym | Definition |
|---|
| IEES➣International Ecological Engineering Society |
| IEES➣Internet Explorer Enhanced Security (Microsoft) |
| IEES➣Institute of Electrochemistry and Energy Systems (Bulgarian Academy of Sciences, Sofia, Bulgaria) |
| IEES➣Inland Empire Emerald Society (Colton, CA) |
| IEES➣International Enzyme Engineering Symposium |
| IEES➣International Equestrian Education Services (Australia) |