| Acronym | Definition |
|---|
| MCU | Ming Chuan University |
| MCU | Multipoint Control Unit |
| MCU | Microcontroller Unit |
| MCU | Machines, Computations and Universality |
| MCU | Marine Corps University |
| MCU | Multipoint Conferencing Unit |
| MCU | Medium Close-Up (cinematography) |
| MCU | Memory Control Unit |
| MCU | Master Control Unit |
| MCU | Milk Clotting Units (proteolytic enzymes potency measure) |
| MCU | Motor Control Unit |
| MCU | Major Crimes Unit |
| MCU | Main Control Unit |
| MCU | Microprocessor Control Unit |
| MCU | Multi-Conference Unit |
| MCU | moisture cure urethane (protective sealant) |
| MCU | Metro Credit Union |
| MCU | Manila Central University (Philippines) |
| MCU | Minimum Coded Unit |
| MCU | Mid-Continent University (Mayfield, KY) |
| MCU | Modular Concept Unit |
| MCU | Multi-Chip Unit |
| MCU | Mutual Credit Union |
| MCU | Miami Christian University |
| MCU | Mobile Control Unit |
| MCU | Mission Computer Upgrade |
| MCU | Module Control Unit |
| MCU | Microcontrol Unit |
| MCU | Micturating Cysto-Urethrogram |
| MCU | Micro Computer Unit |
| MCU | Mike Caro University of Poker |
| MCU | Maintenance Control Unit |
| MCU | Mouvement Circulaire Uniforme (French) |
| MCU | Microprogram Control Unit |
| MCU | Mechanism Control Unit |
| MCU | Mediolanum Corporate University (Milan, Italy) |
| MCU | Metallic Channel Unit |
| MCU | Mass Casualty Unit (various organizations) |
| MCU | Monitored Care Unit |
| MCU | Message Control Unit (radar) |
| MCU | Multiplex Control Unit |
| MCU | maintenance communications unit (US DoD) |
| MCU | Marine Corps Unit |
| MCU | Modem Control Unit |
| MCU | Mobile Calibration Unit |
| MCU | Multi-Compo Unit (MTO&E composite unit with AC, ARNG, and USAR personnel) |
| MCU | Mail and Calendaring Users |
| MCU | Mockup & Compatibility Unit |
| MCU | Monetary Compensatory Unit |
| MCU | Malt Color Unit |
| MCU | Monitor Controller Unit (Hekimian) |
| MCU | Mother and Child Unit |
| MCU | minimum care unit |
| MCU | Major Combat Unit (US Army) |
| MCU | Momentum Compensation Unit |
| MCU | Making Crap Up |
| MCU | Media and Communications Unit (various locations) |
| MCU | Media Center University (Electronic House Expo) |
| MCU | Madison Credit Union (Madison, WI) |