 | MacGregor House (W61) |
| Magnet Lab, Francis Bitter |
 | Mail Services |
| Management, Dean of Sloan School of |
 | Management Magazine, MIT |
 | Management of Technology Program |
 | Manufacturing and Productivity, Lab for |
| Manufacturing Institute |
 | Manufacturing Program, Leaders for |
 | Man-Vehicle Lab |
| Marine Computation and Instrumentation Lab |
| Marine Hydrodynamics Water Tunnel |
| Marlar Lounge |
| Massachusetts General Hospital |
 | Massachusetts Space Grant Consortium |
 | Materials Processing Center |
 | Materials Research in Archaeology and Ethnology, Center for |
 | Materials Science and Engineering, Center for |
 | Materials Science and Engineering, Dept of |
 | Materials Systems Laboratory |
 | Mathematics and Computation, Project on |
 | Mathematics, Dept of |
 | MBA Program |
 | MBTA Pass Program |
 | McCormick Hall (W4) |
 | McGovern Institute for Brain Research |
 | MD (Medical Doctorate) Program |
| Mechanical Engineering, Dept of |
| Mechanical Services Repairs |
| Mechatronic Research Lab |
 | Media Arts and Sciences |
 | Media Laboratory |
 | Mediation@mit |
 | Medical Engineering/Medical Physics Program |
 | Medical, MIT |
 | Medical Records |
| Memorial Rooms |
 | Mental Health Service |
| Message Center--Fax |
| Metallurgy and Materials Science |
| Micro and Nanosystems Lab |
 | Microphotonics Center |
 | Microsystems Technology Laboratories |
| Millstone Radar Site |
| Minority Education, Office of |
 | Minority Introduction to Engineering, Entrepreneurship, and Science Program (MITE2S) |
 | MITAC (MIT Activities Committee) |
 | MIT Card Office |
 | MIT Community Players |
 | MIT Computer Connection (MCC) |
 | MIT Coop |
 | MIT Enterprise Forum |
| MIT Entrepreneurs Club |
 | MIT Entrepreneurship Center |
 | MIT Health Plan |
 | MIT Information Center |
| MIT Medical |
 | MIT Museum |
| MIT Musical Theatre Guild |
 | MIT Optical |
 | MIT Press, The |
 | MIT Professional Institute |
 | MIT Report, The |
 | MIT Science Fiction Society |
 | MIT Student Health Plan |
 | MIT Venture Mentoring Service |
 | MIT Washington Office |
| MIT-Wellesley Bus |
| MIT-Wellesley Upward Bound Program |
 | MIT Women's League |
 | MIT/Woods Hole Joint Program |
| Moore Room |
| Mount Auburn Hospital |
| Movie Information, LSC |
 | Moving Requests |
 | Muddy Charles Pub |
 | Museum |
 | Museum Loan Network |
 | Music |
| Musical Theatre Guild, MIT |