| Acronym | Definition |
|---|
| OEL | Occupational Exposure Limit |
| OEL | Original English Language |
| OEL | Office of Early Learning (various locations) |
| OEL | Optical Engineering Laboratory (University of Warwick, UK) |
| OEL | Oracle Enterprise Linux |
| OEL | Ora et Labora (Latin: Pray and Work) |
| OEL | Occupational Exposure Level |
| OEL | Otto Energy Limited (Australia) |
| OEL | Organic Electroluminescent (display technology) |
| OEL | Office of Experiential Learning (various schools) |
| OEL | Office of Extended Learning (various organizations) |
| OEL | Organic Electro Luminiscence |
| OEL | Organic Electro Luminiscent |
| OEL | Object Oriented Extensible Language |
| OEL | Optional Endorsement Line (US postal service) |
| OEL | Old English Language |
| OEL | Open Ended Line (chemical process industry for a pipe open to the atmosphere) |
| OEL | Organizational Equipment List |
| OEL | Offshore Employee Leasing |
| OEL | Over-Excitation Limiter |
| OEL | Office of Export Licensing |
| OEL | Optical Evaluation Laboratory |
| OEL | Operational Events List |
| OEL | Operational Equipment List (US Army) |
| OEL | Open End License |
| OEL | Opened End Line (of credit) |