Check all full forms of M here

CODE	ABBREVIATION
M	Mega- / Megabyte / Meter (usually as m)
M-)	See no evil
M/W	MicroWave
M2	Mondo 2000
M3P	Microsoft MultiMedia Productions
MA	bell / Maintenance Administrator / Milliampere (usually as mA) / Multiplexed Address
MAAP	Management And Administration Panels
MABO	Multiplier-Arithmetic Bolt-On
MAC	Macintosh Computer / Management and Administrative Computing / Media Access Control / Medium Access Control / Message Authentication / Multi Access Computers / Multiplexed Analog Components
MACBS	Multi-Access Cable Billing System
MACF	Multiple Association Control Function
MACH	Multi-layer ACtuator Head
MACINTOSH	Most Applications Crash; If Not The Operating System Hangs
MACL	Memory Access Control Logic
MACSTAR	Multiple Access Customer STAtion Rearrangement
MACU	Multidrop Auto Call Unit
MADN	Multiple Access Directory Numbers
MAGIK	Master Anarchists Giving Illicit Knowledge
MAH	Milliampere-Hour (usually as mAh)
MAI	Masters of Abstractions and Illusions
MAN	Metropolitan Area Network
MAP	Modular Arthemetic Processor / Manufacturing Automation Processor / Maintenance and Administration Position / Manufacturing Automation Protocol
MAPDU	Management Application Protocol Data Unit
MAPHIS	Memory Array and Processor for Human Intelligence Stor
MAPI	Messaging Application Programming Interface
MAPS	Multiservice Access PlatformS
MAPSS	Maintenance & Analysis Plan for Special Services
MAR	Microprogram Address Register
MARC	MAchine - Readable Cataloging / Market Analysis of Revenue and Customers System
MARCOM	Marketing Communications
MARS	Multicast Address Resolution Server/Service
MAS	MAin Store / Mass Announcement System
MASB	Mass Announcement System Bus
MASC	Mass Announcement System Controller
MASE	Message Administration Service Element
MASM	Mass Announcement System Memory
MASS	Mid-Atlantic and Southern States
MATAC	MATerial ACquisition
MATD	Maximum Acceptable Transit Delay
MATFAP	Metropolitan Area Transmission Facility Analysis Program
MATR	Minimum Average Time Requirement
MATV	Master Antenna Television
MAU	Medium Attachment Unit / Multistation Access Unit
MAW	Microsoft At Work
MB	Megabit (usually as - 1024 kilobytes) / MegaByte (usually as MB) / Memoryless Behavior / MotherBoard
MB/S	Megabits per Second (usually as mb/s)
MBBS	Major Bulletin Board System
MBG	Money Back Guarantee
MBIT	More (data) Bit
MBOD	Manufacturing Board of Directors
MBONE	Multicast backBONE
MBPS	Megabits Per Second (usually as Mbps) / MegaBytes Per
MBR	Master Boot Record
MBS	Master Boot Sector / Maximum Burst Size
MBT	Maximum Burst Tolerance
MBU	Manufacturing Business Unit
MBZS	Maximum Bandwidth Zero Suppression
MC	MicroChannel (architecture) / Mini Cartridge
MCA	Micro Channel Architecture
MCAD	Mechanical Computer Aided Design
MCAM	Manufacturing Corporate Account Manager
MCBTY(SN)	My Computer is Better than Yours (So Nyerrr)
MCC	Master Control Center / Microelectronics and Computer technology Corporation
MCCS	Mechanized Calling Card Service
MCE	Machine Check Exception
MCESS	Mechanical Component Engineering Support Service
MCF	MAC Convergence Function
MCGA	Multi-Color Graphics Array/Adaptor
MCH	Maintenance CHannel
MCHB	Maintenance CHannel Buffer
MCI	Media Control Interface / Microwave Communications Incorporated /
MCIAS	Multi-Channel Intelligent Announcement System
MCIS	Microsoft Commercial Internet System
MCN	Metropolitan Campus Network
MCO	Multiplexer Control Option
MCP	Master Control Program / Microsoft Certified Professional
MCR	Minimum Cell Rate
MCS	Maintenance Control Subsystem / Meeting Communications Service / Microsoft Consulting Services / Multinational Character Set
MCT	Manufacturing Cycle Time
MCTD	Mean Cell Transfer Delay
MCTRAP	Mechanized Customer Trouble Report Analysis Plan/Program
MCU	Mobile Control Unit / Multi Chip Unit / Multiport Conferencing Unit
MCVD	Modified Chemical Vapor Deposit
MD	Make Directory (DOS) / Management Domain / Mediation Device / Message Digest / Mobile Data / Multiple Dissemination / Medical Dumbo
MD5	Message Digest 5 (algorithm)
MDA	Monochrome Display Adapter
MDACS	Modular Digital Access Control System
MDB	Microsoft DataBase (usually as .MDB) / Multidimensional DataBase
MDBS	Mobile DataBase System
MDC	Manipulation Detecting Code / Marker Distributor Control / Market Distributor Control / McAfee Development Center / Meridian Digital Centrex
MDCC	Mobile Data Capture & Communications
MDD	Marshals of Dynamic Discord
MDDB	MultiDimensional DataBase
MDDS	Media and Documentation Update Service
MDF	Main Distribution Frame
MDI	Medium Dependent Interface
MDI	Multiple Document Interface
MDIHMLAIGE	My dog is humping my leg and i'm getting excited
MDIS	Meta Data Interchange Specification
MD-IS	Mobile Data Intermediate System
MDK	Multimedia Development Kit
MDP	Modem Distribution Panel
MDR	Message Detail Record / Message Detail Recording
MDRAM	Multibank Dynamic Random Access Memory
MDS	Mail Delivery System / Message Design System(s) / Multiple Dataset System
MDSE	Message Delivery Service Element
MDSL	Medium-bit-rate Digital Subscriber Line
MDT	Mobile Data Terminal
MDTS	Modem Diagnostic and Test System
MDU	Marker Decoder Unit
MDX	Modular Digital eXchange
ME	Mapping Entity / Mechanical Engineering / Mutually Exclusive
MEC	Mobile Equipment Console
MEG	Megabyte
MELD	Mechanized Engineering and Layout for Distributing Frame
MEM	Manufacturing Engineering and Marketing
MEO	Medium Earth Orbit (satellite)
MERS	Most Economic Route Selection
MES	Manufacturing Execution System
MESI	Modified Exclusive Shared Invalid
MET	Memory Enhancement Technology (usually as MEt) / Multibutton Electronic Telephone
METI	Mailbase Exploring the Internet Workshop
MF	Mediation Function / Medium Frequency / Modulated Frequency / More Fragments / Multi-Frequency / Multiple Frequency
MFC	Microsoft Foundation Class(es)
MFENET	Magnetic Fusion Energy NETwork
MFG	More Friendly Garbage / Manufacturing
MFJ	Modification of Final Judgment / Modified Final Judgment
MFLOPS	Millions of FLoating point Operations Per Second
MFM	Modified Frequency Modulation / Most Favored Nation (trading status)
MFOTS	Military Fiber-Optic Transmission System
MFP	Microsoft Foundation Classes
MFP	MultiFunction Peripherals
MFPS	Mathematical Foundations of Programming Semantics
MFR	Multi-Frequency Receivers
MFS	Macintosh File System
MFT	Metallic Facility Terminal
MFTL	My Favourite Toy Language
MFTP	Multi-cast File Transfer Protocol
MG	MasterGroup
MGA	Monochrome Graphics Adapter
MGT	MasterGroup Translator
MH	Message Handling
MHBFY	My Heart Bleeds For You
MHD	Moving Head Disk
MHDC(A)	My Hard Drive Crashed (Again)
MHOTY	my hat's off to you
MHP	Message Handling Protocol
MHS	Message Handling Service / Message Handling System
MHTS	Message Handling Test System
MHZ	Megahertz (usually as MHz)
MI	Machine Interface / Mode Indicate / Multiple Inheritance
MIB	Man In Black super-secret government agents [X-Philes (fans)] / Management Information Base(s)
MIC	Management Information Center / Management Integration Consortium / Medium Interface Cable / Medium Interface Connector / Memory In Cassette / Microphone / Microsoft Internet Chat / Mode Indicate - Common
MICA	Modem ISDN Channel Aggregation
MICE	Modular Integrated Communications Environment
MICR	Magnetic Ink Character Recognition
MICROSOFT	Majority In Country Realise Operating System Of Fools & Techheads / Making Imaginative Creations Requires Other Superior Forms Of Faster Technology / Most Idiots Can't Realize: Obsolete Software Organization For Technology / Most Intelligent Customers Real
MICROTEL	Microsoft-Intel
MICS	Management Information Conformance Statement
MID	Message ID / Message Identifier
MIDA	Message Interchange for Distributed Application
MIDAS	Manchester Information Datasets and Associated Services / Master Integrated Distribution Subcontracting Agreement
MIDI	Musical Instrument Digital Interface
MIDR	Mosaicked Image Data Record
MIF	Management Information File / Master Item File
MIFF	Management Information Format File
MIG	Metal-In-Gap
MII	Medium Independent Interface
MIL	Management Information Library
MILES	Merisel's Information and Logistical Efficency System
MILNET	Military Network
MIM	Management Information Model
MIME	Multimedia/Multipurpose Internet Mail Extension(s)
MIMG	Media Industry Marketing Group
MIN	Mobile Identification Number
MIND	Modular Interactive Network Designer
MINX	Multimedia Information Network Exchange
MIO	Modular Input/Output
MIP	Multim In Parvum
MIPL	Multimission Image Processing Laboratory/Library
MIPS	Meaningless Indication of Processor Speed / Millions of Instructions Per Second / Multimission Image Processing Subsystem
MIR	Material Increase Request / Maximum Information Rate / Micro-Instruction Register
mIRC	(is defined as) Magnificent Internet Relay Chat (according to `rock in #Undernet)
MIS	Management Information System(s)
MISCF	MISCellaneous Frame
MISG	Market Information Services Group
MIT	Management Information Tree / Massachusetts Institute of Technology / Master Installation Tape
MITI	Ministry of International Trade and Industry
MITS	Microcomputer Interactive Test System
MITV	Microsoft Interactive Television
MJU	Multipoint Junction Unit
MKDIR	Make Directory (DOS)
MLA	Multiple Letter Acronym
MLC	MiniLine Card
MLCD	Multi-Line Call Detail
MLDS	Medium Large Disk Systems
MLHG	MultiLine Hunt Group
MLI	Multiple Link Interface
MLID	Multiple Link Interface Driver
MLN	Main Listed Number
MLP	Maynard List Price / MultiLink Procedures / MultiLink Protocol
MLPC	Model Level planning Committee
MLPP	MultiLevel Precedence and Preemption
MLPPP	MultiLink Point to Point Protocol
MLR	Multichannel Linear Recording
MLS	Multi-Level Security
MLT	Mechanized Loop Testing / Multiple Logical Terminals
MM	Millimeter (usually as mm) / Multimedia
MMAC	MultiMedia Access Center
MMC	Mickey Mouse Club / Minicomputer Maintenance Center / Multimedia Marketing Council
MMCD	MultiMedia Compact Disc (format)
MMD	MultiMedia Document
MMDF	Multi-channel Memorandum Distribution Facility
MMDS	Multipoint Multichannel Distribution Service
MMF	MultiMode Fiber / MultiMode Fiberoptic (cable)
MMFS	Manufacturing Message Format Standard
MMGT	Multimaster Group Translator
MMHS	Military Message Handling System
MMI	Man Machine Interface
MMIF	My Mouth Is Full
MMJ	Modified Modular Jack
MML	Man - Machine Language
MMOC	Minicomputer Maintenance Operations Center
MMS	Main Memory Status / Manufacturing Message Service/Standard / Manufacturing Messaging Specification / Memory Management System / Modular Measurement System
MMT	Multimedia Multiparty Teleconferencing
MMU	Memory Management Unit
MMX	Mastergroup Multiplex(er) / Multimedia Extension(s)
MNCS	Multipoint Network Control System
MNDS	Multi-Network Design System
MNP	Microcom Networking Protocol
MO	Magneto-Optical / Managed Object
MOAC	Message Origin Authentication Check
MOAT	Mother Of All Tests
MOB	Men Of Business
MOC	Manufacturing Outreach Center
MOCA	Merisel Open Computing Alliance
MOCS	Managed-Object Conformance Statement
MOD	Masters Of Deception/Destruction/Disaster
MODEM	MOdulator-DEModulator
MOF	Master Order Form
MOG	Minicomputer Operations Group
MOL	Microsoft Open License
MOLAP	Multidimensional OnLine Analytical Processing
MOLI	Microsoft OnLine Institute
MOM	Manager-Of-Manager / Message Oriented Middleware / Microsoft Office Manager
MOMPL	one MOMent PLease...
MOMV	Manned Orbital Maneuvering Vehicle
MOO	MUD Object Oriented / Multi-user dungeon Object-Oriented
MOP	Maintenance Operations Protocol
MORF	Male OR Female (usually as MorF)
MOS	Material Order System / Metal Oxide Semiconductor
MOSFET	Metal Oxide Semiconductor Field Effect Transistor
MOSIS	Metal Oxide Semiconductor Implementation System
MOSPF	Multicast Open Shortest Path First
MOSS	MIME Object Security Services
MOST	Metal Oxide Semiconductor Transistor
MOT	Managed Object to Test / Masters Of Technology / Means Of Testing
MOTAS	Member Of The Appropriate Sex
MOTD	Message of the day
MOTIS	Message Oriented Text Interchange System
MOTOS	Member Of The Opposite Sex
MOTSS	Member Of The Same Sex
MoU	Memorandum of Understanding
MOV	Metal Oxide Varistor
MP	Machine Processable / Managing Process / Modem Port / Multilink Protocol / Multi-Processor
MPC	Mathematics of Program Construction / Multimedia Personal Computer
MPCC	MultiProtocol Communications Controller
MPCH	Main Parallel CHannel
MPD	Mini Port Driver
MPDT	Multi-Peer Data Transmission
MPDU	Message Protocol Data Unit
MPE	MultiProgramming Executive
MPEG	Motion Picture Expert's Group
MPF	Multilink Packet Fragmentation
MPI	Message Passing Interface / Multiple Protocol Interface
MPL	Multi-schedule Private Line
MPLS	Multi-Protocol Label Switching
MPME	Manufacturing Process and Material Engineering
MPOA	Multiple Protocol Over ATM / MultiProtocol Over ATM
MPOW	Multiple Purpose Operator Workstation
MPP	Massively Parallel Processor(ing) / Multilink Point-to-point Protocol
MPPD	Multi-Purpose Peripheral Device
MPR	Multiple Provider Router / Multi-Port Repeater / Multi-Protocol Router
MPS	Master Production Schedule / Multi-Processor Specification
MPSA	MultiProcessor Server Architecture
MPSC	Manufacturing Planning and Control Systems
MPT	Ministry of Posts and Telecommunications
MPTM	Multi-Parity Test Method
MPW	Macintosh Programmers' Workshop
MPX	MultiPleXer
MQ	Message Queing
MQI	Message Queuing Interface
MR	(modem) Modem Ready / Magneto-Resistive / Message Retrieval
MRAA	Meter Reading Access Arrangement
MRAM	Multibank Random Access Memory
MRB	Multiple Resolution Bitmaps (usually as .MRB)
MRC	Management Response Center / Manufacturing Resource Center / Market Research Center / Medical Research Council
MRCS	Multi-Rate Circuit Switching
MRF	Maintenance Reset Function
MRI	Magnetic Resonance Imaging
MRM	Maximum Rights Mask / Most Recently used Master
MRO	Multi-Region Operation
MRP	Manufacturing Resource Planning
MRSE	Message Retrieval Service Element
MRX	Magneto-Resistive eXtended
MS	Maintenance State / Message Store / Meta Signaling / Microsoft / Microsoft System(s) / Milli-seconds (usually as ms) / More Segments
MSAP	MAC Service Access Point
MSAT	Mobile SATellite
MSAU	Multi-Station Access Unit
MSB	Mid-Range Systems Business / Most Significant Bit / Most Significant Byte
MSC	Media Stimulated Calling
MSCDEX	Microsoft Compact Disc Extensions
MSCP	Mass Storage Control Protocol
MSD	Micro Systems Development / Microsoft Diagnotic / Microwave Semiconductor Device / Most Significant Digit
MSDL	Microsoft Download (service)
MSDN	Microsoft Developer Network
MSDOS	MicroSoft Disk Operating System
MS-DOS	Microsoft Disk Operating System
MSDS	Material Safety Data Sheet
MSF	Measurement Summarization Function
MSFC	Marshall Space Flight Center
MSG	Message
MSI	Medium Scale Integration / Mustang Software Inc.
MSJ	Microsoft Systems Journal
MSL	Microsoft Library / Mirrored-Server Link
MSM	Matrix Switch Module
MSN	Microsoft Network / Monitoring cell Sequence Number / Multiple Subscriber Number
MSO	Mobile Switching Office / Multiple System(s) Operator(s)
MSP	Message Security Protocol
MSPM	Manufacturing System Program Manager
MSR	Model-Specific Registers
MSRP	Manufacturer's Suggested Retail Price
MSS	Maritime Satellite Service / Metropolitan Switching System / Mobile Satellite Service / Modem Substitution Switch / Multiprotocol Switched Services
MSSC	Marketing Sales Strategy Committee
MSSE	Message Submission Service Element
MSSSE	Message Submission and Storage Service Element
MST	Minimum Spanning Tree
MSTP	Multimission Software Transmission Project
MSTS	MicroSoft Terminal Server
MSU	Message Signal Unit / Microsoft University / Modem Sharing Unit
MSVC	Meta-Signaling Virtual Channel
MT	Measured Time / Mitel
MTA	Mail Transfer / Mail Transfer Agent / Major Trading Area / Message Transfer Agent
MTAE	Message Transfer Agent Entity
MTAU	Metallic Test Access Unit
MTB	Magnetic Tape Billing
MTBF	Mean Time Before Failure / Mean Time Between Failure(s)
MTBSI	Mean Time Between System Interruptions
MTC	Manufacturing Technology Center
MTCN	Minimum Throughput Class Negotiation
MTEBBS	Maryland Technology Education Bulletin Board Service
MTF	Master Test Frame / More To Follow
MTFBWY	May The Force Be With You
MTL	Message Transfer Layer
MTOS	MultiTasking Operating System
MTP	Message Transfer Part (SS7) / Message Transfer Protocol
MTR	Mechanized Time Reporting
MTS	Message Telecommunications Service / Message Telephone / Message Transfer Service / Message Transfer System / Message Transport Service / Microsoft Transaction Server / Mobile Telephone Service
MTSE	Message Transfer Service Element
MTSL	Message Transfer SubLayer
MTSO	Mobile Telephone Switching Office
MTTA	Multi-Tenant Telecommunications Association
MTTR	Mean Time To Repair
MTU	Maintenance Termination Unit / Maximum Transmission Unit / Media Tech Unit / Message Transfer Unit
MTX	Mobile Telephone Exchange
MU	Message Unit
MUA	Mail User Agent
MUAA	Modem User's Association of America
MUD	Multi/Multiple User Dungeon / Multi-User Dimension (games) / Multi-User Dimensions / Multi-User Domain
MUF	Maximum Usable Frequency
MUG	Multi User Game
MULDEM	Multiplexer/Demultiplexer
MULTICS	Multiplexed Information and Computing Service
MUP	Multiple Uniform naming convention Provider
MUS	MultiUser System
MUSH	Multi-User Shared Hallucination
MUX	Multiplexer
MV	Millivolt (usually as mV)
MVB	MicroVax Business
MVID	Major Vector ID
MVIP	Multi-Vendor Integration Protocol
MVP	Modular Voice Processor / Multiline Variety Package
MVS	Multiple Virtual Storage
MVS/ESA	Multiple Virtual Storage / Enterprise Systems Architecture
MVS/SP	Multiple Virtual Storage / System Product
MVS/TSO	Multiple Virtual Storage/Time Sharing Option
MVS/XA	Multiple Virtual Storage / eXtended Architecture
MW	MicroWave / MilliWatt (usually as mW) / MultiWink
MWI	Message Waiting Indicator
MWN	Message Waiting Notification
MX	Mail Exchange (record) / Mail Exchanger
MXU	MultipleXer Unit
MYOB	Mind Your Own Business

M

MA                 :- Master of Arts

MAIT             :- Manufacturer's Association of Information Technology

MAPP             :- Madras Atomic Power Project

MASER          :- Microwave Amplification by Stimulated Emission of Radiation

MBA              :- Master of Business Administration

MBBS            :- Bachelor of Medicine and Bachelor of Surgery

MCA              :- Master of Computer Application

MCC              :- Melbourne Cricket Club

MCF               :- Master Control Facility

MCOCA         :- Maharashtra Control of Organized Crime Act

MD                 :- Doctor of Medicine

MECL            :- Mineral Exploration Corporation Limited

MEET             :- Mission for Extension of Educational Technology

MENAS          :- Middle East Navigation Aids Service

MERC            :- Maharashtra Electricity Regulatory Commission

METO            :- Middle East Treaty Organization

MFALA          :- Marginal Farmers and Agricultural Labour Agency

MFALS          :- Marginal Farmers and Agricultural Liberation Scheme

MFN              :- Most Favoured Nation

MI                   :- Military Intelligence

MIGA             :- Multilateral Investment Guarantee Agency

MISA              :- Maintenance of Internal Security Act

MIT                :- Massachusetts Institute of Technology

MLA               :- Member of Legislative Assembly

MLC               :- Member of Legislative Council

MMDS           :- Multiple Microwave Distribution System

MMTC           :- Minerals and Metals Trading Corporation

MNAMS        :- Member of National Academy of Medical Sciences

MNC              :- Multi National Corporation

MNLF            :- Moro National Liberation Front

MPLS             :- Micro Protocol Label Switching

MPLANDS    :- Member of the Parliament Local Areas Development Scheme

MRTPC          :- Monopoly and Restrictive Trade Practice Commission

MRTS            :- Mass Rapid Transport System

MSA               :- Maritime Safety Agency

MST               :- Multi System Transmission

MTCT            :- Mother to Child Transmission

MTCR            :- Missile Technology Control Regime

MODVAT       :- Modified Value Added Tax

MULTA          :- Muslim United Liberation Tigers of Assam