| Abbreviation | Definition |
|---|---|
| ERS | European Respiratory Society |
| ERS | European Rhinologic Society |
| ERSA | European Racquet Stringers Association |
| ERSA | European Rail Software Applications |
| ERSA | European Regional Science Association |
| ERSAP | European Road Safety Action Program |
| ERSC | European Road Safety Charter |
| ERSF | European Radio Sport Federation |
| ERSF | European Road Safety Federation |
| ERSP | European Review of Social Psychology |
| ERST | Europe Report Science Technology |
| ERT | European Rally Trophy |
| ERT | European Register of Toxicologists |
| ERT | European Registered Toxicologist |
| ERT | European Round Table |
| ERTI | Europe Russia Turkey and Israel |
| ERWG | European Regional Working Group |
| ESA | European Seed Association |
| ESA | European Society of Anaesthesiology |
| ESA | European Space Agency's |