| O&OP | Operational and Organizational Plan 
| Others |
| OOP | A Observable Object Programming
| Others |
| OOP | Obfuscation Oriented Programming
| Others |
| OOP | Object Obscure Programming
| Others |
| OOP | Object Of Play
| Others |
| OOP | Object of Preposition
| Others |
| OOP | Object Operations Procedure
| Others |
| OOP | Object Ordering Program
| Others |
| OOP | Object Orientated Programming
| Others |
| OOP | Object Oriented PHP
| Others |
| OOP | Object Oriented Principles
| Others |
| OOP | Object Oriented Procedure
| Others |
| OOP | Object Oriented Program
| Others |
| OOP | Object Oriented Programing
| Others |
| OOP | Object Oriented Programming
| Computer Programming |
| OOP | Object Oriented Project
| Others |
| OOP | Object-Oriented Pascal
| Others |
| OOP | Object-Oriented Programming
| Others |
| OOP | ObjektOrientierte Programmierung
| Others |
| OOP | Observable Object Programming
| Others |
| OOP | On Order Programming
| Others |
| OOP | One Off Payment
| Others |
| OOP | Order Of Predominance (in the ingredients statement)
| Others |
| OOP | Order Of Protection
| Others |
| OOP | Order Of the Palm
| Others |
| OOP | Order of the Phoenix
| Others |
| OOP | Ordinary Object Pointer
| Others |
| OOP | Organization Of Planets
| Others |
| OOP | Oriented Object Program
| Others |
| OOP | Out Of Paper
| Others |
| OOP | Out Of Path
| Others |
| OOP | Out Of Phase
| Others |
| OOP | Out of Place
| Others |
| OOP | Out Of Plane
| Others |
| OOP | Out Of Plant
| Others |
| OOP | Out Of Plaster
| Others |
| OOP | Out Of Play
| Others |
| OOP | Out of Pocket
| Finance |
| OOP | Out Of Point
| Others |
| OOP | Out Of Policy
| Others |
| OOP | Out Of Position
| Others |
| OOP | Out Of Pouch
| Others |
| OOP | Out Of Power
| Others |
| OOP | Out Of Process
| Others |
| OOP | Out Of Production
| Others |
| OOP | Out Of Programme
| Others |
| OOP | Out Of The Pouch
| Others |
| OOP | Out-Of-Pocket
| Others |
| OOP | Over Object Programming
| Others |
| OOP | Overnight Open Position
| Others |
| OOP | The Order Of The Phoenix
| Others |