| OPG | Object Programmer's Guide 
| Others |
| OPG | Occupant Protection Guards
| Others |
| OPG | ocular plethysmography
| Others |
| OPG | OculoPlethysmoGraphy
| Others |
| OPG | of the Public Guardian
| Others |
| OPG | Office of Problem Gambling
| Others |
| OPG | Office of Projects and Grants
| Others |
| OPG | Office of Public Guardian
| Others |
| OPG | Office of the Paymaster General
| Others |
| OPG | Office of the Public Guardian
| Others |
| OPG | Office Planning Group
| Others |
| OPG | Official Pistol Gang
| Others |
| OPG | Official Police Garage
| Others |
| OPG | Official Police Garages
| Others |
| OPG | Official Pricing Guide
| Others |
| OPG | Ogn, Papua New Guinea
| Others |
| OPG | OhioHealth Physician Group
| Others |
| OPG | Oil Pressure Gauge
| Others |
| OPG | Oil Pump Gasket
| Others |
| OPG | Oldroyd Publishing Group
| Others |
| OPG | Online Performers Group
| Others |
| OPG | Online Policy Group
| Others |
| OPG | Ontario Power Gen
| Others |
| OPG | Ontario Power Generation
| Others |
| OPG | oocysts per gram (of faeces)
| Others |
| OPG | Operation Pet Game
| Others |
| OPG | Operations Planners Group
| Others |
| OPG | Operations Planning Group
| Others |
| OPG | Operations Proving Ground
| Others |
| OPG | Optic Pathway Glioma
| Others |
| OPG | Optical Parametric Generator
| Others |
| OPG | Orbital Police Guard
| Others |
| OPG | Order Processing Guideline
| Others |
| OPG | Organisms per Gram
| Others |
| OPG | Organization Project Grants
| Others |
| OPG | Organizational Performance Group
| Others |
| OPG | Original Parts Group
| Others |
| OPG | OrthoPantomoGram
| Others |
| OPG | Osteoprotegerin
| Others |
| OPG | Outpatient Procedure Grouper
| Others |
| OPG | Output Gain
| Others |