| MMU | Cal Fire's Madera-Mariposa-Merced Unit 
| Others |
| MMU | Malfunction Management Unit
| Others |
| MMU | Malfunction Management Units
| Others |
| MMU | Malfunction Monitor Unit
| Others |
| MMU | Manchester Metropolitan University
| Others |
| MMU | Manned Maneuvering Unit
| Others |
| MMU | Mass Memory Unit
| Others |
| MMU | Matrix Management Unit
| Others |
| MMU | Mechanical Mechanism Utility
| Others |
| MMU | Mechanized Mining Unit
| Others |
| MMU | Medium Machine gun Upgrade
| Others |
| MMU | Mega Man Universe
| Others |
| MMU | Memory Management Unit
| Others |
| MMU | Mesh Multiring Upgrade
| Others |
| MMU | Micro Monde Union
| Others |
| MMU | Milli Merck Unit
| Others |
| MMU | Million Monetary Units
| Others |
| MMU | Mini Mart Unit
| Others |
| MMU | Minimum Mapping Unit
| Others |
| MMU | Minimum Mapping Units
| Others |
| MMU | Mobile Medical Unit
| Others |
| MMU | Morristown Municipal Airport
| Others |
| MMU | Morristown, New Jersey
| Others |
| MMU | Motherboard Memory Unit
| Others |
| MMU | Mount Mansfield Union
| Others |
| MMU | Multi Material Upgrade
| Others |
| MMU | Multi Media Unit
| Others |
| MMU | Multi-Media University
| Others |
| MMU | Myanmar Maritime University
| Others |