Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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M mach number
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MA message assurance
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MAA maximum authorized IFR altitude
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M2K mobility 2000
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mb millibars
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mV millivolts
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MAC medium access controller
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MACC military area control center
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MACS multiple access communication system
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MADARS malfunction detection, analysis and recording system
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MAHWP missed approach holding waypoint
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MALDT mean administrative and logistics delay time
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MALE medium-altitude, long-endurance
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MAN metropolitan area network
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MANPADS man portable air defense system
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MAP missed approach
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MAP missed alert parameter
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MAP missed approach procedure
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MAP monitor alert parameter
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MAPt missed approach point
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MAR mobile access router
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MARSA military assumes responsibility for separation
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M/ASI mach/airspeed indicator
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MASPS minimum aviation system performance standards
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MAST multiaircraft simulation terminal
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MAT maintenance access terminal
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MAV micro air vehicle
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MAWP missed approached waypoint
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MAX maximum
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MB marker beacon
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MBE multiple bit error
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MBER minimum bit error rate
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MBPS megabytes per second
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MC master change
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MCA minimum crossing altitude
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MCB microwave circuit board
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MCC maintenance control computer
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MCDP maintenance control display panel
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MCDU multifunctional control display unit
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MCI mode C intruder
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MCN manufacturing control number
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MCOS multi-computing operating system
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MCP maintenance control panel
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MCP mode control panel
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MCT max continuous thrust
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MCU modular concept unit
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MCU multifunction concept unit
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MDA minimum descent altitude
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MDA Missile Defense Agency
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MDAH minimum descent altitude/height
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MDAU maintenance data acquisition unit
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MDC maintenance diagnostic computer
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MDCRS Meteorological Data Collection and Reporting Service
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MDD mission data debrief
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MDL multipurpose data link
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MDR mode digital radio
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MDS minimum discernible signal
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MDT maintenance display terminal
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MDT mean downtime
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MEA minimum en route altitude
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MEC main equipment center
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MEL minimum equipment list
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MEO medium earth orbit
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MEOT multiple-expert opinion team
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MES main engine start
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MET meteorology
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METAR meteorological aviation routine weather report
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MF medium frequency
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MFCP multifunction control display panel
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MFD multifunction display
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MFDS malfunction display system
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MFDU malfunction display unit
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MFDUA miscellaneous flight data acquisition units
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MFIT mean fault isolation time
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MFM maintenance fault memory
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MGSCU main gear steering control unit
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MGR manager
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MHD magnetic hard drive
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MHD multi-hazard display
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MHRS magnetic heading reference system
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MHS message handling service
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MHz megahertz
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MIB management information base
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MIC microphone
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MicroEARTS micro en route automated radar tracking system
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MIDS multifunction information distribution system
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MIDU multi-purpose interactive display unit
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MILAERO military/aeronautical
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MILS multiple independent levels of security
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MILSPEC military specification
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MIL-STD military standard
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MIMO multi-input/multi-output
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MIN minimum/minute
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MIPS management interface protocol specification
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MIPS million instructions per second
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MKR marker
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MLA maneuver limited altitude
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MLM mid-level management
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MLS microwave landing system
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MLW maximum landing weight
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MM mass memory
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MM middle marker (glideslope)
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MMI man-machine interface
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MMIC monolithic microwave integrated circuit
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MMR multimode receiver
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MMS maintenance management system
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MMSI miniature munitions system interface
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MMU memory management unit
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MMW millimeter wave
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MNCID management network category interaction diagram
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MNPS minimum navigation performance specification
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MNS managed network service
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MO managed object
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MO magneto-optical
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MOA military operation area
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MOA memorandum of agreement
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MOCA minimum obstacle clearance altitude
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MOD modification
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MOD magneto-optical drive
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MODEM modulator/demodulator
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MOPR minimum operational performance requirements
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MOPS minimum operational performance standards
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MOQA maintenance operations quality assurance
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MORA minimum off-route altitude
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MOS metal oxide semiconductor
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MOSA modular open systems approach
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MOU memorandum of understanding
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MOV metal oxide varsitor
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MPAR multipurpose airport radar
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MPEG-3 moving picture expert group
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MPCU multiport protocol converter unit
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MPDS mobile packet data service
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MPEL maximum permissible exposure level
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MPM microwave power module
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MPP materials, processes and parts
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MPS maintenance processor system/ subsystem
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MRA minimum reception altitude
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MRR manufacturing revision request
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MRT mean repair time
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MRT multi-remote terminal
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M&S merging & spacing
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Ms millisecond
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MSB most significant bit
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MSC Member Services Center
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MSC message sequence chart
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MSCP mobile satellite service provider
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MSD mass storage device
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MSG message
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MSI medium scale integration
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MSK minimum shift keying
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MSL mean sea level
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M-SNDCF mobile-subnetwork dependent convergence function
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MSP Mode S specific protocol
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MSSR monopulse secondary surveillance radar
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MSSS Mode S specific services
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MSU mode select unit
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MT minimum time
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MTA message transfer agent
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MTBF mean time between failure
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MTBO mean time between outages
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MTBR mean time between removal/repairs
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MTI moving target indicator
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MTTR mean time to repair
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MTTRS mean time to restore service
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MTBUR mean time between unscheduled removal
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MTBUR mean time between unit replacements
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MTC maintenance terminal cabinet
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MTD maintenance terminal display
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MTF maintenance terminal function
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MTI moving target indicator
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MTM module test and maintenance
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MTMBIU MTM bus interface unit
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MTR military training route
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MTSAT Multifunction Transport Satellite
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MTTDA mean time to dispatch alert
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MTTF mean time to failure
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MTTM mean time to maintenance
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MTTMA mean time to maintenance alert
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MTTR mean time to repair
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MTTUR mean time to unscheduled removal
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MU management unit
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MUE modernized user equipment
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MUS minimum use specification
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MUSE multi-user system environment
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MUX multiplexer
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MWARA major world air route area
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MWP meteorological weather processor
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MWS missile warning system
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