| Abbreviation | Definition |
|---|---|
| MS | Mineralogical Society |
| MS | Mineralogical Society of Great Britain and Ireland |
| MSA | Malaysian Scientific Association |
| MSA | Mediterranean Studies Association |
| MSA | Mineralogical Society of America |
| MSA | Musicological Society of Australia |
| MSA | Mycological Society of America |
| MSA | Persatuan Ahli-Ahli Sains Malaysia |
| MSAE | Michigan Society of Association Executives |
| MSAE | Midwest Society of Association Executives |
| MSAE | Missouri Society of Association Executives |
| MSAI | Malaysian Society of Allergy and Immunology |
| MSAI | Malaysian Society of Allergy Immunology |
| MSAI | Persatuan Alergi & Imunologi Malaysia |
| MSAM | Malaysian Society of Aesthetic Medicine |
| MSAS | Mexborough Swinton Astronomical Society |
| MSAS | Mountain Skies Astronomical Society |
| MSAW | Mauritius Society for Animal Welfare |
| MSC | Microscopical Society of Canada |
| MSC | Société de Microscopie du Canada |