| Abbreviation | Definition |
|---|---|
| MMSA | Master of Midwifery of the Society of Apothecaries |
| MMSA | Medical Mycological Society of the Americas |
| MMSA | Mining and Metallurgical Society of America |
| MMSG | Molecular Manufacturing Shortcut Group |
| MMSN | Mountain Medicine Society of Nepal |
| MNCC | Gabungan Komputer Nasional Malaysia |
| MNCC | Malaysian National Computer Confederation |
| MNL | Maatschappij der Nederlandse Letterkunde |
| MNL | Society of Netherlands Literature |
| MNMBS | Mid North Michigan Blues Society |
| MNPS | Malaysian Natural Products Society |
| MNPS | Minnesota Native Plant Society |
| MNS | Madras Naturalists Society |
| MNS | Malaysian Nature Society |
| MNS | Mediterranean Neuroscience Society |
| MOCS | My Otaku Comment Society |
| MOROCCANSOCIETYFORENDOMETRIOSISANDREPRODUCTIVEMEDE | "MSERM" We promote a patient-centred culture by constantly improving and prioritising |
| MORSS | Military Operations Research Society Symposium |
| MOS | Mathematical Optimization Society |
| MOS | Missouri Oncology Society |