ORSA
| Acronym | Definition |
|---|---|
| ORSA | Operations Research Society of America |
| ORSA | Own Risk and Solvency Assessment |
| ORSA | Occupational Road Safety Alliance (UK) |
| ORSA | Options Regulatory Surveillance Authority |
| ORSA | Outpatient Reduced-Cost Simplified Application (Los Angeles County, CA) |
| ORSA | Oxacillin Resistant Staph Aureus |
| ORSA | Operations Research & System Analysis |
| ORSA | Augustinian Recollects (religious order) |