| Abbreviation | Definition |
|---|---|
| ERF | European Robotics Forum |
| ERFA | European Rail Freight Association |
| ERG | European Regulators Group |
| ERG | European Research Group |
| ERGO | European Research Gateways On |
| ERGO | European Roma Grassroots Organisation |
| ERGP | European Regulators Group for Post |
| ERIC | European Research Infrastructure CESSDA |
| ERIC | European Research Infrastructure Consortium |
| ERIC | European Research Initiative on CLL |
| ERIC | European Rotaract Information Centre |
| ERIH | European Route of Industrial Heritage |
| ERIO | European Roma Information Office |
| ERIS | European Regional Information Society |
| ERL | European Robotics League |
| ERM | European Reference Materials |
| ERM | European Restructuring Monitor |
| ERMS | European Register of Marine Species |
| ERN | European Reference Networks |
| ERN | European Remanufacturing Network |