| ORP | Objective Rally Point 
| Others |
| ORP | Ocean Reception Point
| Others |
| ORP | Oconomowoc Residential Programs
| Others |
| ORP | Odor Reception Process
| Others |
| ORP | Off Road Package
| Others |
| ORP | Off Road Pages
| Others |
| ORP | Off Road Parking
| Others |
| ORP | Off Road Pipe
| Others |
| ORP | Office for Research Protections
| Others |
| ORP | Office of Research and Projects
| Others |
| ORP | Office of River Protection
| Others |
| ORP | Offline Raid Protection
| Others |
| ORP | OFS (Orbiter Functional Simulator) Retransmission Processor
| Others |
| ORP | Okret Rzeczypospolitey Polskiey
| Others |
| ORP | Okret Rzeczypospolitey Polskiey (Poland)
| Others |
| ORP | On Road Price
| Others |
| ORP | Oncology Research Program
| Others |
| ORP | Open Role Playing
| Others |
| ORP | Open Router Project
| Others |
| ORP | Open Runtime Platform
| Others |
| ORP | OpenRISC Reference Platform
| Others |
| ORP | Operational Ration Packet
| Others |
| ORP | Optimal Retirement Planner
| Others |
| ORP | Optimization for Radiation Protection
| Others |
| ORP | Optimization of Radiation Protection
| Others |
| ORP | Optimum Recording Power
| Others |
| ORP | Optional Retirement Plan
| Others |
| ORP | Optional Retirement Program
| Others |
| ORP | Ordering Referring and Prescribing
| Others |
| ORP | Oregon Raceway Park
| Others |
| ORP | Organisational Review Programme
| Others |
| ORP | Original Retail Price
| Others |
| ORP | Orville Rudemeyer Pygenski
| Others |
| ORP | Our Rare Pairings
| Others |
| ORP | Outdoor Recreation Program
| Others |
| ORP | Outpatient Rehabilitation Program
| Others |
| ORP | Output Routing Pool
| Others |
| ORP | Oxidation Reduction Potential
| Others |
| ORP | Oxidative Reduction Potential
| Others |
| ORP | Oxydation Reduction Potential
| Others |
| ORP | Oyster Recovery Partnership
| Others |