| Acronym | Definition |
|---|
| POR | Portal |
| POR | Process of Reference (manufacturing technology) |
| POR | Portuguese (language) |
| POR | Point of Receipt |
| POR | Point of Reference |
| POR | Process of Record |
| POR | Point of Return |
| POR | Position of Responsibility (Boy Scouts of America) |
| POR | Prophets of Rage (band) |
| POR | Provided on Request |
| POR | Price On Request |
| POR | Plan Of Record |
| POR | Period of Review |
| POR | Path of Righteousness (worship) |
| POR | Proof of Residence |
| POR | Program of Record |
| POR | Power On Reset (Sun) |
| POR | Power on Reset |
| POR | Point of Resolution |
| POR | Panel of Reference |
| POR | Plane of Rotation |
| POR | Places of Refuge |
| POR | Plan of Reorganization |
| POR | Provider of Record |
| POR | Press On Regardless |
| POR | Pay on Return |
| POR | Programmi Operativi Regionali (Italian: Regional Operational Programs) |
| POR | Pool of Radiance (game) |
| POR | Porbeagle (FAO fish species code) |
| POR | Predatory Offender Registration (Minnesota) |
| POR | Pacific Ocean Region |
| POR | Pastrami on Rye |
| POR | Patient Oriented Research |
| POR | Public Opinion Research |
| POR | Point of Receive |
| POR | Problem Oriented Record (healthcare) |
| POR | Prophecy of Ro (gaming; EverQuest) |
| POR | Policy Organisation and Rules (Scout Association; UK) |
| POR | Per Occupied Room (hospitality industry) |
| POR | Patent Office Record |
| POR | Pirates Online Rewritten (Pirates of the Caribbean gaming) |
| POR | Pay Off Reel |
| POR | Plant Operating Record |
| POR | Post Operation Report |
| POR | Program of Requirements |
| POR | Party of the Right (Yale Political Union; est. 1952) |
| POR | Paid on Results (marketing network; UK) |
| POR | Personnel Occurrence Report |
| POR | Pelosi-Obama-Reid |
| POR | Purchase Order Request |
| POR | Post-Installation Report |
| POR | Purchase Order Response |
| POR | Personal- und Organisationsreferat |
| POR | Pori, Finland - Pori (Airport Code) |
| POR | Power Off - Reset (elevator industry) |
| POR | Profit on Return |
| POR | Packet Out-Of-Order Delivery Ratio |
| POR | Project Officer's Report |
| POR | Pechala Overall Rating (finance) |
| POR | Preparation of Overseas Replacements |
| POR | Permanent Obstetric Record |
| POR | Plutonium Organic Recycle |
| POR | Permissive Over-Reach |
| POR | Partially-Ordered Ranks (Deadlock Avoidance algorithm) |
| POR | Per Order Request |
| POR | Port of Receipt (shipping) |
| POR | Packet Overlay Retrofit |
| POR | Proposed Ordnance Requirement |
| POR | Preliminary Occurrence Report |
| POR | Project or Organizational Risk |
| POR | Partially Optimal Routing (networks) |
| POR | Planning Objectives Report |
| POR | Proximity Overlap Reduction |
| POR | Product Objective & Requirements |
| POR | Partido Obrero Revolucionarioo |
| POR | President's Operating Report (corporate management) |
| POR | Project Objectives Review |