| M/ATMP | Missiles/Air Target Materials Program 
| Others |
| M/BR | Master Bedroom
| Others |
| M/CM | Mine/ Countermine
| Others |
| M/CM/S | Mobility, Countermobility, and/or Survivability
| Others |
| M/CPL | Master Corporal
| Others |
| M/F | Maintenance Factor
| Others |
| M/F | Male to Female
| Others |
| M/F/D/V | Male/Female/Disabled/Veteran
| Others |
| M/F/D/V | Minority/Female/Disabled/Veteran
| Others |
| M/F/V/H | Male/ Female/ Veteran/ Handicap
| Others |
| M/G | Mother and Guardian
| Others |
| M/H | Man Hour
| Others |
| M/H | Meters Per Hour
| Others |
| M/H | Multi-handicapped
| Others |
| M/I | Minimum Impulse
| Others |
| M/J | Middle (School) / Junior (High)
| Others |
| M/J | Middle School/ Junior High
| Others |
| M/L | Maintenance Loop
| Others |
| M/L | Mid Level
| Others |
| M/LR | Maintenance Loop Recorder
| Others |
| M/MIN | Meters Per Minute
| Others |
| M/OPS | Method/Of Operations
| Others |
| M/P | Main Parachute
| Others |
| M/R | Mixture Ratio of fuel to oxidizer
| Others |
| M/S | M & S Systems
| Others |
| M/S | Master/Session
| Others |
| M/S | Measurement Stimuli
| Others |
| M/s | Messrs
| Others |
| m/s | Meter per second
| Others |
| M/S | Meters Per Second
| Others |
| m/s | miles per second
| Others |
| M/S | Motor Ship
| Others |
| M/SCI | Mission/Safety Critical Item
| Others |
| M/Supp Rm | Maintennance Supply Room
| Others |
| M/T | Measurement Ton
| Others |
| M/U | Mockup
| Others |
| M/W | Matching With
| Others |
| M/W | MicroWave
| Others |
| M0 | Maneuver Control System Workstation class computer unit
| Others |
| m1 | first marriage
| Others |
| M1 | Metalsmith 1st Class Petty Officer
| Others |
| M1 | Monetary One
| Others |
| M1 | Multi-Purpose First Type Gun
| Others |
| M11 | Text file (MASS11)
| Others |
| M12 | Mitral Twelve
| Others |
| M18 | 18th Meridian of longitude
| Others |
| M18 | Mara-18
| Others |
| M18 | Messerschmitt M 18
| Others |
| M18 | Messier 18
| Others |
| M18 | Miles M.18
| Others |