English abbreviations from om to omdc
- OM (Outer marker)
- O.M. (Ordo [Fratrum] Minimorum (Minims of St. Francis of Paola))
- OM&M (Operations Maintenance and Monitoring)
- OMA (Ocular motor apraxia)
- OMAP (Open Multimedia Applications Platform)
- OMAR (Operation and Maintenance, Army Reserve)
- OMARNG (Operation and Maintenance, Army NG)
- O-MaSE (Organization-based Multi-agent System Engineering)
- OMB (Office of Management and Budget)
- OMC (Ormoc Airport)
- O.M.C. (Ordo Minorum Conventualium (Conventual Franciscans))
- O.M. Cap., O.F.M. Cap., O.M.C. (Ordo Minorum Cappucinorum (Capuchins))
- OMCK (Office of Military Cooperation Kuwait)
- OMCRS (Outreach Missions Charitable and Religious Society)
- OMCS (Oxford Materials Characterisation Services)
- OMD (Orchestral Manoeuvres in the Dark (1980s pop group))
- OMDC (Ontario Media Development Corporation)