| Abbreviation | Definition |
|---|---|
| MSEC | Management of Soil Erosion Consortium |
| MSF | Major Streetball Foundation |
| MSF | Médecins Sans Frontières (Doctors Without Borders) |
| MSF | Michael Stern Foundation |
| MSF | Motorcycle Safety Foundation |
| MSIC | Michigan Society for Infection Control |
| MSII | Mission Safety International, Inc. |
| MSK | Marketing Society of Kenya |
| MSKCC | Memorial Sloan-Kettering Cancer Center |
| MSLF | Massachusetts Soldiers Legacy Fund |
| MSLF | Mountain States Legal Foundation |
| MSMBC | Michigan Statewide Minority Business Center |
| MSNC | Multiple Sclerosis National Centre |
| MSNM | Master of Science in Nonprofit Management |
| MSNRI | Multiple Sclerosis National Research Institute |
| MSR | Microsoft Research |
| MSRA | Michigan Shipwreck Research Associates |
| MSRC | Multiple Sclerosis Resource Centre |
| MSS | Multiple Sclerosis Society |
| MSSRF | M. S. Swaminathan Research Foundation |