| Acronym | Definition |
|---|
| OMSG➣Oh My! Sorry, Gas |
| OMSG➣Overseas Military Sales Group |
| OMSG➣Officine Meccaniche San Giorgio (Italian: Machine Shop San Giorgio) |
| OMSG➣Officer Midshipman Study Guide (US Navy) |
| OMSG➣Ottawa Medieval Sword Guild (est. 2001; Ottawa, Ontario, Canada) |
| OMSG➣Online Media Sales Group (Germany) |
| OMSG➣Office of the Massachusetts State Geologist (est. 2002; University of Massachusetts; Amherst, MA) |
| OMSG➣Oxford Medical School Gazette (Oxford, England, UK) |
| OMSG➣Oh My Stars and Garters |