| Acronym | Definition |
|---|
| IMSG➣International Messages |
| IMSG➣International Marketing and Sales Group (Moscow, Russia) |
| IMSG➣Iraqi Media Safety Group (advocacy and training) |
| IMSG➣Information Management System Group |
| IMSG➣Informational Message |
| IMSG➣International Metals Study Group |
| IMSG➣IM Systems Group, Inc. |
| IMSG➣Institutional Mortgage Service Group (Countrywide Credit Industries, Inc.) |