| Marketing & Social Research Association | Academic & Science |
| Michigan Shipwreck Research Association | Academic & Science |
| Makers Summer Robotics Academy | Academic & Science |
| Maryland State Retirement Agency | Business |
| Michigan Shipwreck Research Associates | Community |
| Midwest Street Rod Association | Community |
| Midwest Scholastic Rowing Association | Community |
| Master of Science in Recording Arts | Community |
| Microsoft Support and Recovery Assistant | Computing |
| Microsoft Remote Assistance | Computing |
| Microsoft Security Risk Assessment | Computing |
| Master of Science In Regulatory Affairs | Educational Degree |
| Minnesota Street Rod Association | General |
| Manitoba Street Rod Association | General |
| methionine sulfoxide reductase A | General |
| Master Ship Repair Agreement | General |
| Methionine Sulfoxide Reductase Abbreviation | General |
| Multi Specialty Recruitment Assessment | General |
| Montana Street Rod Association | General |
| Mid South Racing Association | General |
| Modified Stock Racing Association | General |
| Michigan Street Rod Association | General |
| Microsoft Security Response Alliance | Governmental |
| Magnuson Stevens Reauthorization Act | Governmental |
| Military Service Relief Act | Governmental |
| Member Shared Responsibility Amount | Medical |
| Microsoft Research Asia | Softwares |
| Windows Remote Assistance | Softwares |
| Metropolitan Squash Racquets Association | Sports |
| Mid-states Rodeo Association | Sports |
| Michiana Soccer Referees Association | Sports |
| Maryland Street Racing Association | Sports |
