IECS
| Acronym | Definition |
|---|---|
| IECS | Institute of Estuarine and Coastal Studies (University of Hull; Hull, England, UK) |
| IECS | Improved Environmental Clothing System (Canadian forces) |
| IECS | Instituto Europeo Campus Stellae (Spanish: European Institute Stellae Campus; Santiago de Compostela, Spain) |
| IECS | Integrated Environment for Communication on Ship (Selex Communications) |
| IECS | Integrated Environmental Control System |
| IECS | Inland Empire Commuter Services (Riverside, CA) |
| IECS | Intelligent Enterprise Control System |