OPAR
| Acronym | Definition |
|---|---|
| OPAR | Objectivism: the Philosophy of Ayn Rand (book by Leonard Peikoff) |
| OPAR | Office of Payment Accuracy and Recovery (Oregon Department of Human Services; Salem, OR) |
| OPAR | Office of Policy Analysis and Review |
| OPAR | Oregon Partnership for Alzheimer's Research |
| OPAR | Office of Public and Alumni Relations (Rutgers University; New Jersey) |