| Abbreviation | Definition |
|---|---|
| MAPO | Multiple Assembly of Procurement Officials |
| MAPS | Minnesota Accounting and Procurement System |
| MARVIN | Michigan's Automated Response Voice Interactive Network |
| MASC | Municipal Association of South Carolina |
| MASSP | Maryland Association of Secondary School Principals |
| MASSP | Michigan Association of Secondary School Principals |
| MASSP | Minnesota Association of Secondary School Principals |
| MAST | Michigan Alcohol Screening Test |
| MAVO | Missouri Association of Veterans Organizations |
| MB | ManitoBa |
| MBAF | Minnesota Business Assistance Form |
| MBAT | Mayor's Business Action Team |
| MBC | Metropolitan Borough Council |
| MBD | Midland Business Development |
| MBD | Missouri Births and Deaths |
| MBFI | Maine Bureau of Financial Institutions |
| MBOS | Member Benefits Online System (NJ) |
| MBS | Management Board Secretariat |
| MBS | Midland, Bay City, Saginaw |
| MBTA | Massachusetts Bay Transit Authority |