| Acronym | Definition |
|---|
| OMM | Organisation Météorologique Mondiale (French: World Meteorological Organization) |
| OMM | Oblivion Mod Manager (gaming software) |
| OMM | Organización Meteorológica Mundial (Spanish: World Meteorological Organization) |
| OMM | On My Mama |
| OMM | Organizzazione Meteorologica Mondiale |
| OMM | Osteopathic Manipulative Medicine |
| OMM | One Minute Manager (business book) |
| OMM | Output Message Manual |
| OMM | One Million Moms |
| OMM | Original Mountain Marathon (UK) |
| OMM | Open Minded Music (est. 2003; UK) |
| OMM | Osaka Merchandise Mart (Osaka, Japan) |
| OMM | Online Marketing Management |
| OMM | Order of Military Merit |
| OMM | Old Man Murray (website) |
| OMM | Osteopathic Manual Medicine |
| OMM | Orange Mountain Music (record company; New York, NY) |
| OMM | Old Man Mike |
| OMM | Online Macromolecular Museum |
| OMM | Operation and Maintenance Manual |
| OMM | Other Makes & Models |
| OMM | Officer of the Order of Military Merit |
| OMM | Orbiter Major Modification (NASA) |
| OMM | O'Melveny and Myers (law firm) |
| OMM | Offshore Minerals Management Program |
| OMM | On My Machine |
| OMM | One Minute Movie (Sundial Film Festival) |
| OMM | Overlord Mata Muram (gaming, Everquest) |
| OMM | Optical Micro-Machines, Inc. |
| OMM | Operation, Maintenance, and Monitoring (project management) |
| OMM | Operations and Materials Management |
| OMM | Officer Messenger Mail (US Navy) |
| OMM | Over Mint-Mark |
| OMM | Operational Maturity Model |
| OMM | Orbiter Maintenance and Modification (NASA) |
| OMM | Orthogonal Multipulse Modulation |
| OMM | Open Mediation Manager |
| OMM | Officer Mobilization Model |
| OMM | Organizational Maintenance Manual |
| OMM | Office for Mere Mortals (Microsoft Office) |
| OMM | Orbital Maintenance Mission |
| OMM | One Man Mafia (online game) |
| OMM | Organizational Mastery Methodology (Stanford Advanced Project Management) |
| OMM | On-board Mission Management |
| OMM | Online Maintenance Management Portal (IBM) |
| OMM | Outgoing Message Manager |
| OMM | Operations Management Meeting |
| OMM | Outbound Message Manager |
| OMM | Optical Media Module |
| OMM | Open Music Model |