IEES
| 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) |