| Acronym | Definition |
|---|
| OPR | Operator |
| OPR | Office of Primary Responsibility |
| OPR | Open Peer Review |
| OPR | Operations |
| OPR | Office of Professional Responsibility |
| OPR | Operate |
| OPR | Overall Pressure Ratio |
| OPR | Office of Professional Regulation (various locations) |
| OPR | Office of Planning and Research |
| OPR | Operation |
| OPR | Out Pulse Rule |
| OPR | Office Password Recovery |
| OPR | Official Pattern Release |
| OPR | Onshore Pipeline Regulations (Canada) |
| OPR | Office of Population Research (Princeton University) |
| OPR | Old Port Rum |
| OPR | Offre Publique de Retrait |
| OPR | Office of Parental Representation (various locations) |
| OPR | Officer Performance Report |
| OPR | Owner's Project Requirements (building design) |
| OPR | Office of Parks and Recreation (Oakland, CA) |
| OPR | Open Pattern Repository (software pattern project) |
| OPR | Outside Pack Referee (Women's Flat Track Roller Derby) |
| OPR | Office of Public Relations (Centers for Medicare & Medicaid Services) |
| OPR | On Premise Reserve (aviation) |
| OPR | Other People's Resources |
| OPR | Office of Principal Responsibility |
| OPR | Owner Program Requirements |
| OPR | Online Public Relations |
| OPR | Operation Patriot Readiness |
| OPR | Operator Performance Rate |
| OPR | Old Parochial Register (genealogy; UK) |
| OPR | Official Poker Rankings (website) |
| OPR | Old Prussian (linguistics) |
| OPR | Optical Pattern Recognition |
| OPR | Organización de Protección Reconocida |
| OPR | Organization of the People of Rodrigues (Mauritius) |
| OPR | Optical Power Received |
| OPR | Old Plank Road (Irish acoustic band) |
| OPR | Oracle Parallel Server (HP) |
| OPR | Office of Prime Responsibility |
| OPR | Overseas Publishers Representatives (New York, NY) |
| OPR | Operating Pressure Ratio (jet engine compression ratio) |
| OPR | Organization of Primary Responsibility |
| OPR | Ongoing Precision Recovery |
| OPR | Operational Project Requirements |
| OPR | Office of Public Record |
| OPR | Offsite Procurement Request |
| OPR | Organizational Process Record |
| OPR | Optimal Page Replacement |
| OPR | Outside Plant Repeater (Hekimian) |
| OPR | One Price Repair (various companies) |
| OPR | Orthogonal Projection Routine |
| OPR | Organizational Profitability Reporting |
| OPR | Ohio Pig Roast (catering; Columbus, OH) |
| OPR | Outage Probability Region |
| OPR | Officer with Primary Responsibility |
| OPR | Original Purchase Receipt |
| OPR | Old People Rock |
| OPR | Operability Recommendation (various organizations) |
| OPR | Overall Project Review |