| Abbreviation | Definition |
|---|---|
| OMQ | OnlineMortgageQuotes.net |
| OMR | Olchak Market Research |
| OMSC | ONE Management Services Company |
| OMSC | Overseas Military Sales Corporation |
| OMT | OmniMedia Technologies, Inc. |
| OMT | Orthopaedic Manipulative Physiotherapists |
| OMU | Owensboro Municipal Utilities |
| OMV | Our Master's Voice Audio |
| OMW | Ogden Murphy Wallace, P. L. L. C. |
| OMW | On Mercurys Wing |
| OMX | Ocean Matrix |
| ONA | Omogeneia News Agency |
| ONA | Online News Association |
| ONB | Ohio Nut and Bolt Company |
| ONCG | Oil and Natural Gas Corporation Limited |
| ONEC | Oman National Electric Company |
| ONEU | Ocean Network Express Holdings Ltd |
| ONG | Oklahoma Natural Gas Company |
| ONGC | Oil and Natural Gas Corp |
| ONGC | Oil and Natural Gas Corporation |