| Abbreviation | Definition |
|---|---|
| ECO | Economics |
| ECO | English and Cultural Orientation |
| ECO | Exploring Career Opportunities |
| ECOS | Environmental Coordination Office Of Students |
| ECOS | Environmentally Concerned Organization of Students |
| ECPI | Electronics Communications Programming And Information |
| ECPM | European Center of Pharmaceutical Medicine |
| ECS | Electronic and Computer Science |
| ECS | Electronic Citation System |
| ECSC | Environmental Cooperative Science Center |
| ECSU | Eastern Connecticut State University |
| ECSU | Elizabeth City State University |
| ECSU | Elizabeth City State University Elizabeth City State University |
| ECSU | Ethiopian Civil Service University |
| ECU | East Carolina University |
| ECU | East Central University |
| ECU | Edith Cowan University |
| ECUA | Evangel Christian University of America |
| ECUST | East China University of Science and Technology |
| ECVAM | European Centre for the Validation of Alternative Methods |