| Abbreviation | Definition |
|---|---|
| EPIN | European Policy Institute Network |
| EPIN | European Policy Institutes Network |
| EPRI | Economic Policy Research Institute |
| EPRI | Electric Power Research Institute |
| EPRI | Eportselectric Power Research Institute |
| EPTI | European Personal Training Institute |
| EPTRI | Environment Protection Training & Research Institute |
| EQI | Electa Quinney Institute |
| EQI | Environmental Quality Institute |
| ERI | Earth Research Institute |
| ERI | Earthquake Research Institute |
| ERI | Ecological Restoration Institute |
| ERI | Economic Research Institute |
| ERI | efficiency of redistributive institutions |
| ERI | Equipment Reliability Institute |
| ERI | Eye Research Institute |
| ERIA | Economic Research Institute for ASEAN |
| ERITE | EAfrica Research Institute for Technology and Economics |
| ERSI | Environment Rating Scales Institute |
| ESBI | Entrepreneurship Small Business Institute |