| OM&M | Of Mice & Men 
| Others |
| OM&M | Operations Maintenance and Monitoring
| Others |
| OM&M | Operations, Maintenance, and Monitoring
| Others |
| OMM | Obsolete Media Miami
| Others |
| OMM | Officina Mille Miglia
| Others |
| OMM | Offshore Minerals Management Program
| Others |
| OMM | Oh My Mint
| Others |
| OMM | Okta Mobility Management
| Others |
| OMM | Old Mill Marina
| Others |
| OMM | Omni Miser
| Others |
| OMM | On My Mama
| Others |
| OMM | On my mind
| Others |
| OMM | On My Mind:
| Others |
| OMM | On My Mother
| Others |
| OMM | On the Macedonian Matter
| Others |
| OMM | One Mile Mobility
| Others |
| OMM | One Moment Meditation
| Others |
| OMM | Online Machine Monitoring
| Others |
| OMM | Online Macromolecular Museum
| Others |
| OMM | Online Marketing Manager
| Others |
| OMM | Online Media Management
| Others |
| OMM | Open Market Model
| Others |
| OMM | Open Music Model
| Others |
| OMM | Operation and Maintenance Management
| Others |
| OMM | Operation and Maintenance Manual
| Others |
| OMM | Operation Maintenance and Monitoring
| Others |
| OMM | Operational Multisystem Management
| Others |
| OMM | Operations and Maintenance, Marine Corps
| Others |
| OMM | Optical Micro Machines
| Others |
| OMM | Oracle Open Market Model
| Others |
| OMM | Orangetown Mighty Midgets
| Others |
| OMM | Orbiter Major Modification
| Others |
| OMM | Order of Military Merit
| Others |
| OMM | Organizacion Mundial de Medicina Natural
| Others |
| OMM | Original Mountain Marathon
| Others |
| OMM | Osteopathic Manipulative Medicine
| Others |
| OMM | Osteopathic manual medicine
| Others |
| OMM | Output Message Manual
| Others |
| OMM | Over Mint Mark
| Others |
| OMM | Over Mintmark
| Others |