MBR (master boot record)
MCA (Micro Channel Architecture)
MCM (Multi-Chip Module)
MDRAM (Multibank DRAM)
MFM (Modified Frequency Modulation)
MFT (Master File Table)
MIC (Memory Interface Controller)
MIDI (Musical Instrument Digital Interface)
MIG (Metal-In-Gap)
MMO (mobile module)
MMU (memory management unit)
MMX (Multi-Media eXtensions)
MNP (Microcom Networking Protocol)
MOV (metal-oxide varistor)
MPC (Multimedia PC)
MPEG (Motion Pictures Expert Group)
MPS (Multi-Processor Specification)
MR (Magneto-Resistive)
MSCDEX (Microsoft CD-ROM Extensions)
MSD (Microsoft Diagnostics)
MTBF (Mean Time Between Failures)
MTTF (Mean Time To Failure)