| Abbreviation | Definition |
|---|---|
| ECSO | European Cyber Security Organisation |
| ECSPP | European Chemical Site Promotion Platform |
| ECSS | European College of Sport Science |
| ECSS | European Computer Science Summit |
| ECSS | European Cooperation for Space Standardisation |
| ECSS | European Cooperation For Space Standardization |
| ECSS | European Cooperation on Space Standardization |
| ECST | European Carotid Surgery Trial |
| ECST | European Charter for Sustainable Tourism |
| ECStA | European Council for Student Affairs |
| ECT | European Centre of Technology |
| ECT | European Conferences in Thermoelectrics |
| ECT | European Continental Type |
| ECTA | European Chemical Transport Association |
| ECTA | European Competitive Telecommunication Association |
| ECTA | European Competitive Telecommunications Association |
| ECTA | European Core and Tube Association |
| ECTA | European Cutting Tools Association |
| ECTE | European Center in Training for Employment |
| ECTE | European Course in Tropical Epidemiology |