| Abbreviation | Definition |
|---|---|
| MSC | Socit de Microscopie du Canada |
| MSCH | Malaysian Society of Clinical Hypnosis |
| MSCK | Medical Society of the County of Kings |
| MSCO | Massachusetts Society of Clinical Oncologists |
| MSCP | Malaysian Society of Clinical Psychologists |
| MSCSE | Macau Society of Civil and Structural Engineers |
| MSDP | Merseyside Society for Deaf People |
| MSDU | Midwest Society of Diagnostic Ultrasound |
| MSE | Malaysian Society Essex |
| MSEA | Mission Society of |
| MSEA | Mission Society of Enrolled Agents |
| MSES | Medical Staff Engagement Society |
| MSES | Minnesota Surveyors and Engineers Society |
| MSET | Maryland Society for Educational Technology |
| MSET | Michigan Society of Electroneurodiagnostic Technologists |
| MSGS | Montana State Genealogical Society |
| MSHAA | Member Society of Hearing Aid Audiologists |
| MSHCA | Missouri Society of Health Care Attorneys |
| MSHRM | Massachusetts Society for Healthcare Risk Management |
| MSHRM | Mobile Society For Human Resource Management |