| Acronym | Definition |
|---|
| OEP | OxyElite Pro (USPlabs, LLC) |
| OEP | Occupant Emergency Plan |
| OEP | Offentlig Elektronisk Postjournal (Danish: Public Electronic Mail Journal; Norway) |
| OEP | Oyster Extension Permit (UK) |
| OEP | Outer Membrane Efflux Protein |
| OEP | Optimisation par Essaim Particulaire (French: Particle Swarm Optimization) |
| OEP | Open Encyclopedia Project |
| OEP | Opto-Electronic Plethysmography |
| OEP | Oblique Extension Principle |
| OEP | Omission Evoked Potential |
| OEP | Other Equipment & Property |
| OEP | Order of Emmaus Pilgrims (United Church of Christ) |
| OEP | Occurrence Exceedance Probability Curve (insurance) |
| OEP | Office of Emergency Preparedness (US Department of Health and Human Services) |
| OEP | Octaethylporphyrin |
| OEP | Optimised Effective Potential |
| OEP | Oil Extraction Process |
| OEP | Optometric Extension Program |
| OEP | Office of Environmental Policy |
| OEP | Office of Enforcement Policy |
| OEP | Open Enrollment Period (US Medicare) |
| OEP | Overhead Expense Plan |
| OEP | Oxford Economic Papers |
| OEP | Operational Evolution Plan |
| OEP | Offline Explorer Pro (software) |
| OEP | Original Entry Point |
| OEP | Office of Emergency Planning |
| OEP | Officer Exchange Program |
| OEP | Oil of Evening Primrose (dietary supplement) |
| OEP | Operand Execution Pipeline |
| OEP | Office of Ecosystem Protection (US EPA) |
| OEP | Original Equipment Part (various companies) |
| OEP | Office of External Programs |
| OEP | Orszagos Egeszsegbiztositasi Penztar (Hungarian: National Healthcare Fund) |