SV Svenska ordbok från opel corsa till operation dragoon
- Opel Corsa
- Opel Frontera
- Opel Kadett
- Opel Laubfrosch
- Opel Meriva
- Opel Senator
- Opel Vectra
- Opel Zafira
- Open Directory Project
- Open Enterprise Server
- Open Range
- Open Shortest Path First
- Open Sound System
- Open Source Development Labs
- Open Systems Interconnection
- Open University
- Open Water
- OpenArena
- Openbox
- OpenSolaris
- OPENSTEP
- OpenSUSE
- OpenTibia
- OpenVMS
- OpenVPN
- opera
- Opera -n
- Opera buffa
- Opera metal
- opera-
- operabel
- Operación Puerto
- Operaen på Holmen
- operahus
- Operahuset i Sydney
- operand
- operaroll
- operatext
- operation
- Operation -en -er
- Operation Achilles
- Operation Ajax
- Operation Artemis
- Operation Bagration
- Operation Barbarossa
- Operation Blå
- Operation Condor
- Operation Corkscrew
- Operation Desert Storm
- Operation Dragoon
