| Abbreviation | Definition |
|---|---|
| MC | MegaCycles (superseded by megahertz) |
| MC | Midnight Commander |
| MC | Military Claimant |
| MC | Military Committee |
| MC | Military Committee (NATO) |
| MC | Military Community |
| MC | Military Coup |
| MC | Mission Capable |
| MC | Mission Critical |
| MC | Mission-Capable |
| MC | Mobilization Component |
| MC | Morale Check |
| MC | Movement Control |
| MC | Multi Channel |
| MC&G | Mapping, Charting, and Geodesy |
| MC/FI | Mass Casualty/fatality Incident |
| MC-130 | Combat Talon (I and II) |
| MC4 | Medical Communications for Combat Casualty Care |
| MCA | Magdalo Cyber Army |
| MCA | Mail Control Activity |