| Acronym | Definition |
|---|
| O&M➣Operations & Maintenance |
| O&M➣Ogilvy & Mather |
| O&M➣Operations and Management |
| O&M➣Orientation & Mobility |
| O&M➣Operation and Maintenance |
| O&M➣Organization and Management |
| O&M➣Offshore & Marine |
| O&M➣Original and Mineral (haircare) |
| O&M➣Observation and Measurement |
| O&M➣Owens & Minor (Fortune 500 company) |
| O&M➣Oceanography and Meteorology |
| O&M➣Organization & Methods |
| O&M➣Outline and Mounting |
| O&M➣Ohio and Mississippi Railroad |
| O&M➣Ozy & Millie (comic) |
| O&M➣Operator & Maintainer |