M

M

Mega (10⁶)

m

metre (the SI base unit for length)

m

milli (10^-3)

MAC

Message-Authentication Code

MAC

Multiply/ACcumulate

MAC

Media Access Control

MACH

??? 

MAD COPP

Maximum Automated Deployment for Criminal Operations and Police Procedures (Car 54, Where Are You?)

MAP

Minimum Adverticed Price

MAPI

Mail API (suggested by HLN)

MAR

Marred Aspect Ratio (What P&S really is)

MASH

Mobile Army Surgery Hospital

MASH

??? (CD technology)

MAU

Multistation Access Unit

Mb

Megabyte (1024 Kb, 2²⁰ b)

MC

Moving Coil

MC

Music Cassette (or MusiCassette)

MCA

Micro Channel Architecture

MCP

Master Control Program (Tron)

MD

MiniDisc (Sony)

MDT

Mountain (USA) DST (GMT-6)

MFC

Microsoft Foundation Classes

MFLOPS

Million FLoating point Operations Per Second

MFS

Macintosh File System (replaced by HFS) (Apple)

MGE

Microstation Graphic Environment (a Microstation extension system)

MIA

Missing In Action

MIDI

Musical Instrument Digitial Interface

MIME

Multipurpose Internet Mail Extensions

MIPS

Million Instructions Per Second

MIS

Management Information System

MIS

Må Ikke Slettes [Do not erase]

MIT

Massachusetts Institute of Technology, USA

MLP

Meridian Lossless Packing

MM

Moving Magnet

MM

Marilyn Monroe

MMX

Multi-Media eXtensions (to the Pentium CPU architecture) (Intel)

MN

Multi-National

MO

Magneto-Optical

MO

Modus Operandi [Method of Operations]

MoDem

Modulation/Demodulation

MOTSS

Member Of The Same Sex

MOTSS

More Of The Same Shit

MP3

MPEG-1 Audio Layer 3

MP@ML

Main Profile at Main Level

MPAA

Motion Picture Association of America

MPEG

Moving Picture Experts Group

MPH

Miles Per Hour

MPP

Massive Parallel Processing

MPV

Multi-Purpose Vehicle

MPW

Macintosh Programmer's Workshop (Apple)

MRI

Magnetic Resonance Imager

MSN

MicroSoft Network

MSNBC

MSN/NBC (TV joint venture)

MSRP

Manufacturer's SRP

MSS

Medbring Selv Sprut [BYOB]

MST

Mountain (USA) Standard Time (GMT-7)

MT

MiniTower

MTBF

Mean Time Between Failure

MTG

Modern Times Group

MTV

Music TV

MUD

Multi User Dungeon

MVH

Med Venlig Hilsen [best regards]

MVNO

Mobile Virtual Network Operator

MW

Medium Wave