| Acronym | Definition |
|---|
| OOL | Office of Licensing (various locations) |
| OOL | Office of Open Learning (University of Guelph; Canada) |
| OOL | Optimum Online |
| OOL | Open Objects Library |
| OOL | Object Oriented Language |
| OOL | Origin of Life |
| OOL | Out of Line |
| OOL | Out of Luck |
| OOL | Object-Oriented Language |
| OOL | Out of Life |
| OOL | Out of Limits |
| OOL | Gold Coast, Queensland, Australia - Coolangatta (Airport Code) |
| OOL | Operation Overlord (D-Day invasion, WWII) |
| OOL | Out of Lock |
| OOL | Object-Oriented Lingo |
| OOL | Oil Offloading Line |
| OOL | Optimize Optimum Online |
| OOL | Out On Leave |
| OOL | Office of Oceanography and Limnology |
| OOL | Order of Laibach (gaming clan) |
| OOL | Open Office Landscape (office architecture) |