O&M
| 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 |