| Acronym | Definition |
|---|
| PRO | Professional |
| PRO | Public Record Office (British Archives) |
| PRO | Patient Reported Outcome (clinical trial research) |
| PRO | Peer Review Organization |
| PRO | Performing Rights Organization |
| PRO | Philippine Ragnarok Online (gaming) |
| PRO | Parks and Recreation Ontario (Canada) |
| PRO | Adjusted Production (baseball statistic) |
| PRO | Packet Re-Ordering |
| PRO | Photographic Research Organization Inc. |
| PRO | Proper Ram-air Orientation (parachute packing method) |
| PRO | Pittsburgh Roleplaying Organization |
| PRO | Pionniers de la Route Organisation (French: Pioneers of the Road Organization) |
| PRO | Planning and Reporting Officer |
| PRO | Preplanned Response Option |
| PRO | Petrol Range Organics (environmental risk assessment) |
| PRO | Progressive Rate Optimal |
| PRO | Patient Resource Office |
| PRO | Personnel Records On-Line |
| PRO | Potomac Region Outings (Sierra Club Virginia Chapter) |
| PRO | Point de Raccordement Optique (France TELECOM) |
| PRO | Publication Requirement Officer |
| PRO | Project Residence Office (US Coast Guard) |
| PRO | Prepare, Read and Organize (reading process) |
| PRO | Protracted Refugee and Displaced Person Operations (until May 1998; see PRRO) |
| PRO | Prioritized Regional Objective |
| PRO | Programmed Reduction Objective(s) |
| PRO | Prorate |
| PRO | Prohibition Party |
| PRO | Plant Representative Office |
| PRO | Problem Resolution Officer |
| PRO | Procedure |
| PRO | Proceed |
| PRO | Pricing and Revenue Optimization (Manugistics Group, Inc.) |
| PRO | Public Relations Officer |
| PRO | Processor |
| PRO | Proline (Amino Acid) |
| PRO | Producer Responsibility Organisation |
| PRO | Principal Race Officer (sailboat racing) |
| PRO | Prospect Research Online (Canada) |
| PRO | Precision RISC (reduced instruction set computing) Organization |
| PRO | Professional Review Organization (healthcare) |
| PRO | Patient Results Online (healthcare) |
| PRO | Police Regional Office (Philippines) |