MSU
- Gout
- Imam Muhammad ibn Saud Islamic University
- MSU Argentina
- MSU Lossless Video Codec
- Maharaja Sayajirao University of Baroda
- Mahasarakham University
- Mahendra Sanskrit University
- Management and Science University
- Manonmaniam Sundaranar University
- Maritime State University
- McMaster Students Union
- McNeese State University
- Metropolitan State University
- Metropolitan State University of Denver
- Michigan State University
- Microwave sounding unit
- Midlands State University
- Midwestern State University
- Million service units
- Mimar Sinan Fine Arts University
- Mindanao State University
- Minnesota State University Moorhead
- Minnesota State University, Mankato
- Minot State University
- Mississippi State University
- Missouri State University
- Mobile stroke unit
- Moldova State University
- Montana State University System
- Montclair State University
- Morehead State University
- Morgan State University
- Moscow State University
- Moshoeshoe I International Airport
- Mountain State University
- Multinational Specialized Unit
- Murray State University
- Museum of Contemporary Art, Zagreb
- Muslim Student Union of the University of California, Irvine
- Musom language
- Studite Brethren
- Tegevajaro Miyazaki
- University of Memphis
- University of Missouri