OPALS
| Acronym | Definition |
|---|---|
| OPALS | Ontario Prehospital Advanced Life Support (study) |
| OPALS | Ogren Plant Allergy Scale (Thomas Ogren) |
| OPALS | Older People with Active Lifestyles (trademark of Dr. David J. Demko) |
| OPALS | Optimized Portfolio As Listed Securities |
| OPALS | Owain Phyfe Appreciative Listener Society (fan club) |
| OPALS | Officer Projection Aggregate Level System |