| 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 |