| Acronym | Definition |
|---|
| OPEP➣Organización de Países Exportadores de Petróleo |
| OPEP➣Organisation des Pays Exportateurs de Pétrole (French: OPEC) |
| OPEP➣Occupational Post-Exposure Prophylaxis |
| OPEP➣Oil Pollution Emergency Plan (UK) |
| OPEP➣Oscillating Positive Expiratory Pressure (respiratory therapy) |
| OPEP➣Organização dos Países Exportadores de Petróleo (Portuguese) |
| OPEP➣Ontario Pesticide Education Program (Canada) |
| OPEP➣One-Pion Exchange Potential |
| OPEP➣Organització de Països Exportadors de Petroli |
| OPEP➣Orbit Plane Experiment Package |