| Acronym | Definition |
|---|
| OEF | Operation Enduring Freedom (US government response to September 11, 2001 terrorism attacks) |
| OEF | Operation Enduring Freedom (US DoD) |
| OEF | Office of Educational Facilities (Florida Department of Education) |
| OEF | Oxygen Extraction Fraction |
| OEF | Original Electronic Format (document format) |
| OEF | Open Education Faculty (Turkey) |
| OEF | Oxford Economic Forecasting |
| OEF | Operational Experience Feedback (EU) |
| OEF | Open End Fund |
| OEF | Optimal Extension Fields (elliptic curve cryptosystems) |
| OEF | Oregon Entrepreneurs Forum |
| OEF | Order Entry Format (various organizations) |
| OEF | Order of Ecumenical Franciscans (religious order) |
| OEF | Olfactory Evoked Magnetic Field |
| OEF | ODST (Orbital Drop Shock Trooper) Expeditionary Force (gaming clan) |
| OEF | Ojai Education Foundation (Ojai, CA) |
| OEF | Ontario Equine Federation (Canada) |
| OEF | Operational Efficiency Factor |
| OEF | Organization Enhancement Fund |
| OEF | Open Experimentation Framework |
| OEF | Ocean Environmental File |
| OEF | Open-End Face |