M
 | MAC Media Access Control
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| MAC Message Authentication Code A unique message parameter allowing confirmation that the message has not been tampered with.
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| MAN Municipal / Metropolitan Area Network A communications network that covers a geographic area such as a city or suburb.
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| MAP Multi Access Protocol
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| MAPI Messaging Application Programming Interface Providing an interface between Microsoft and other messaging systems
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| MARS Multicast Address Resolution Service
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| MATV Master Antenna TeleVision
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| MAU Media Attachment Unit
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| MAU Multiple Access Unit
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| MB Mega Bytes One million Bytes
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| MBE Molecular Beam Epitaxy
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| MBG Multi location Business Group
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| MBS Maximum Burst Size
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| MCA Micro Channel Architecture
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| MCI Media Control Interface Windows component that allows programming to multi media devices |
| MCNS |
Multimedia Cable Network System
| MCPT |
Multiple Carriers Per Transport
| MCR |
Minimum Cell Rate
| MCTD |
Mean Cell Transfer Delay
| MCU |
Multipoint Control Unit
| MD Mini Disc Smaller that CD, typically 140Mb of storage
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| MDF Main Distribution Frame
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| MDLP Mobile Data Link Protocol
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| MDPE Medium Density PolyEthylene
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| MDS Multipoint Distribution Service
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| MDS Message Delivery Service
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| MER Modulation Error Ratio
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| MeSFET Metal Semiconductor Field Effect Transistor
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| MET Mobile Electronic Transactions
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| MF Multi Frequency
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| MFLOPS Million FLoating point Operations Per Second
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| MFN Mini Fiber Node
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| MHz MegaHertz A unit of frequency equal to one million cycles per second
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| MIB Management Information Base
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| MID Message IDentifier
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| MIDI Musical Instrument Digital Interface Interface for the connection of musical instruments to a computer
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| MIME Multipurpose Internet Mail Extension Browser plug-ins that identify the type of file extension and applicable program to run it
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| MIPS Millions of Instructions Per Second Commonly used to describe the rate of CPU speed
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| MIS Management Information System
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| MLBA Multi node Load Balancing Architecture
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| MLID Multiple Link Interface Driver
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| MLP Multi Link Protocol
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| MM Multi Mode
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| MM Multi Meter
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| MMDS Multipoint Multichannel Distribution Service Utilising microwave technology to transmit information from point to point
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| MMI Man Machine Interface
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| MMT Modulation Mode Table
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| MNLB Multi Node Load Balancing
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| MOMagneto Optical
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| MODEMMODulator DEModulator
Probably the most common form of transmitting data to a remote site from the consumer market
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| MoSFETMetal Oxide Semiconductor Field Effect Transistor
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| MOVMOVie
File extension
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| MP3 MPeg layer 3
Common format for storing audio files
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| MPEG Motion Picture Experts Group A working group of ISO, also refers to the file formats developed by the group. |
| MPLS |
Multi-Protocol Label Switching
Provides label based switching based on IP routing and control protocols. It can work with any media over which network layer packets can be passed between network layer entities
| MPOA Multi-Protocol Over ATM
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| MPP Massively Parallel Processing A type of supercomputer architecture in which all tasks are divided as evenly as possible among hundreds or thousands of microprocessors.
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| MPP Message Posting Protocol
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| MPPP Message Point to Point Protocol
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| MPR Multi Protocol Router
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| MRCS Multi Rate Circuit Switching
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| MRU Maximum Receive Unit
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| MS Mobile Station
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| MS Multiplexing Sublayer
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| MSA Metropolitan Service Area
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| MSB Most Significant Bit
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| MSC Message Sequence Chart
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| MSDOS Microsoft Disk Operating System Operating Standard System for PCs
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| MSN Monitoring cell Sequence Number
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| MSO Multiple System Operator
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| MSP Music Service Provider Provides access to many audio files |
| MSP |
Managed Service Provider
| MSVC |
Meta Signaling Virtual Circuit
| MTA |
Mail Transfer Agent
| MTBF |
Mean Time Between Failures
Can refer to individual units, but normally associated with the system. Typical Example is PC with MTBF of 10,000 powered on hours MTBF. Average working hours per day 9 hours, average working days per year 253. Therefore 9x 253 = 2277 hours. 10,000 / 2277 = 4.39. Therefore the system should remain in a working state for 4.39 years.
| MTS |
Modem Termination System
| MTSO |
Mobile Telephone Switching Office
| MTTR |
Mean Time To Repair
A manufacturers estimated time to repair the system
| MTU Maximum Transmission Rate
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| MUA |
Mail User Agents
| MUX |
Multiplexer
| MVS Multiple Virtual System IBM
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| MWLAN |
Mobile Wireless Local Area Network