| Abbreviation | Definition |
|---|---|
| OMI | OptiMetrics, Incorporated |
| OMI | Orthopaedic Medicine International |
| OMI | Owens Minor Inc |
| OMIC | Overseas Merchandise Inspection Co. |
| OMLACSA | Old Mutual Life Assurance Company South Africa |
| OMM | Optical Micro Machines |
| OMM | Optical Micro Machines, Inc. |
| OMM | Opus Mariæ Mediatricis |
| OMMC | Ocean Maritime Management Company |
| OMN | On-line Marketing Network |
| OMN | Ottawa Manufacturers' Network |
| OMNI | Older Men New Ideas |
| OMO | Occupational Medicine Office |
| OMP | Obagi Medical Products |
| OMP | Obagi Medical Products, Inc. |
| OMP | Office Managing Partner |
| OMP | Online Marketing and Publishing |
| OMP | The Open Mind Project |
| OMPC | Oman Munition Production Company |
| OMPI | Obagi Medical Products Inc |