| Acronym | Definition |
|---|
| OPPL➣Oak Park Public Library |
| OPPL➣Ouachita Parish Public Library (Louisiana) |
| OPPL➣Ontario Paintball Players League (Ontario, Canada) |
| OPPL➣Office of Professional Preparation and Licensure (Purdue University; West Lafayette, IN) |
| OPPL➣Office of Program and Public Liaison (US NIH) |
| OPPL➣Osmotic Pressure of Plasma (anesthesiology) |