| Abbreviation | Definition |
|---|---|
| OMC | Olmsted Medical Clinic |
| OMC | Orbitel Mobile Communications |
| OMC | Orchard Machinery Corporation |
| OMC | Orissa Mining Corporation |
| OMC | Outboard Marine Company |
| OMC | Outboard Motor Company |
| OMC | Outboard Motor Corporation |
| OMCs | Operations Management Consulting Services, L.L.C |
| OMCs | Oxford Men's Counselling Service |
| OMD | Original Man Designs |
| OMDC | ONT Media Dvlpt Corp |
| OMDC | Ontario Media Development Corporation |
| OMDC | Orissa Minerals Development Company |
| OMDC | Overseas Market Development Corporation |
| OMG | Officine Meccaniche Gonzaga |
| OMGI | Orion Marine Group Inc |
| OMH | Online Marketing Heroes |
| OMI | Office Mate International, Ltd. |
| OMI | Operations Management International |
| OMI | Optical Mechanics Inc |