| MSAI | Main Street America Institute 
| Others |
| MSAI | Malaysian Society of Allergy and Immunology
| Others |
| MSAI | Malaysian Society of Allergy Immunology
| Others |
| MSAI | Management Science Associates Inc
| Others |
| MSAI | Management Sciences Applications Incorporated
| Others |
| MSAI | Marine Science Associates Inc
| Others |
| MSAI | Maryland Statewide Addressing Initiative
| Others |
| MSAI | Master of Science in Artificial Intelligence
| Others |
| MSAI | Mechanical Systems Analysis Inc
| Others |
| MSAI | Michael Spaziani Architect Inc
| Others |
| MSAI | Microsoft Access Intermediate
| Others |
| MSAI | Mississippi Summer Art Institute
| Others |
| MSAI | Mobile Standards Alliance of India
| Others |
| MSAI | Multidimensional School Anger Inventory
| Others |
| MSAI | Persatuan Alergi & Imunologi Malaysia
| Others |