| Abbreviation | Definition |
|---|---|
| MSRC | Mississippi Society for Respiratory Care |
| MSRC | Missouri Society for Respiratory Care |
| MSRD | Maryland Society for the Rheumatic Diseases |
| MSRG | Media Society Research Group |
| MSRI | Mountain Societies Research Institute |
| MSRS | Mid South Rocket Society |
| MSRT | Maryland Society Of Radiologic Technologists |
| MSRT | Mississippi Society of Radiologic Technologists |
| MSRT | Missouri Society Of Radiologic Technologists |
| MSS | Maryland Society of Surveyors |
| MSS | Midwest Sociological Society |
| MSS | Migration Studies Society |
| MSSA | Medical Student Society Association |
| MSSA | Microscopy Society of Southern Africa |
| MSSA | Mid-South Sociological Association |
| MSSC | Marine Society and Sea Cadets |
| MSSC | Microscopic Society of Southern California |
| MSSC | Mineralogical Society of Southern California |
| MSSF | Mycological Society of San Francisco |
| MSSI | Melbourne Sustainable Society Institute |