| OEF | Oklahoma Earthbike Fanatics
| Others |
| OEF | Oklahoma Earthbike Fellowship
| Others |
| OEF | Oklahoma Engineering Foundation
| Others |
| OEF | One Earth Future
| Others |
| OEF | Ontario Equestrian Federation
| Others |
| OEF | Open ECDIS Forum
| Others |
| OEF | Operation Enduring Freedom 
| Military |
| OEF | Order of Ecumenical Franciscans
| Others |
| OEF | Oregon Entrepreneurs Forum
| Others |
| OEF | Osborn Educational Foundation
| Others |
| OEF | Outcomes and Evidence Framework
| Others |
| OEF | Oxford Economic Forecasting, Ltd.
| Others |
| OEF | Oxford Energy Forum
| Others |
| OEF | Oxygen Extraction Fraction
| Others |