M
- MAC – Media Access Control; Macintosh - Netzwerk
- MB – Megabyte, Mainboard - Speicher
- MC – Memory Controller - Prozessor
- MCP – Media and Communication Processor - Mainboard
- MDI – Multiple Document Interface - Software
- MDIX – Medium-Dependet Interface-X - Netzwerk
- MESI – Modified, Exclusive, Shared, Invalid - Prozessor
- MFLOPS – Million Floating Point Operations Per Second - Prozessor
- MHz – MegaHertz
- MIDI – Musical Instrument Digital Interface - Multimedia
- MIMO – Multiple Input Multiple Output - Netzwerk
- MIPS – Million Instructions Per Second - Prozessor
- MMC – Multi Media Card - Kamera
- MMU – Mass Memory Unit, Memory Management Unit - Prozessor
- MMX – Multi Media Extensions - Prozessor
- Modem – Modulator-Demodulator - Internet
- MOS – Metal-Oxide-Semiconductor - Elektronik
- MPEG – Motion Pictures Experts Group - Multimedia
- MPU – Microprocessing Unit - Prozessor
- MRAM – Magnetic RAM - Speicher
- MTU – Maximum Transfer Unit - Internet
- MXM – Mobile PCI Express Module - Laptop