| Acronym | Meaning |
| MMU | Manned Maneuvering Unit (NASA) |
| MMU | Media Monitoring Unit (various locations) |
| MMU | Medicare Modernization Update (US DHHS) |
| MMU | Memorandum of Mutual Understanding (various locations) |
| MMU | Military Medical University (China) |
| MMU | Mini Mart Unit (US Navy) |
| MMU | Minimum Mapping Unit |
| MMU | Mobile Meteorological Unit |
| MMU | Multinational Medical Unit (NATO) |