M
- M-Audio
- M.E.Y. Equipment
- MAAX
- Macally
- Mace
- Mach Speed Technologies
- Mackie
- MacroSystem Digital Video
- Macurco
- Mad Catz
- Magellan
- Magenta
- Magic Chef
- Magma
- Magnadyne
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- Magnetek
- MAGPiX
- Majestic
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- Mantis
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- Marcum Technologies
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- Mark Levinson
- Mark Of Fitness
- Marley Engineered Products
- Marmitek
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- Marshall Amplification
- Martin Audio
- MartinLogan
- Marvel Industries
- Marvin
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- Masterbuilt
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- Mastic
- Matias
- Matrox Electronic Systems
- Matsushita
- Mattel
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- Maxim
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- MaxTech
- Maxtor
- Maxus
- Maxxsonics
- Maytag
- Mazda
- MB QUART
- MBW
- McAfee
- McCulloch
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- McDonald's
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- MD
- Mead
- Meade
- Meco
- Mediasonic
- Medion
- MediSense
- Medline
- MegaTech
- Megger
- Meizu Electronic Technology
- Melissa
- Melitta
- Mellerware
- Memorex
- Mentor
- Meopta
- Mercedes-Benz
- Merco Savory
- Mercury
- Mercury Marine
- Meridian Audio
- Meridian Data
- Meritor
- Mermaid
- Mesa/Boogie
- Metabo
- method
- MetLife
- Metra Electronics
- METRO
- Metrologic Instruments
- Metz
- Meyer
- Meyer Sound
- MGE UPS Systems
- MHP
- Michael Graves
- Michelin
- Micro Innovations
- Micro Technic
- MicroBoards Technology
- Microlife
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- Micronics
- Microsoft
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- Microtek
- Microtest
- Midas
- Middleby Cooking Systems Group
- Middleby Marshall
- Midea
- MidiLand
- Midland Radio
- Midway
- Miele
- Miglia Technology
- Milan Technology
- Miller Electric
- Million Dollar Baby
- Milnor
- Milton Bradley
- Milwaukee
- Milwaukee Instruments
- Minelab
- Mini
- Minicam
- Minicom Advanced Systems
- Minolta
- Minox
- Minuteman UPS
- Mio
- Miracle
- Mirage Loudspeakers
- Miro Displays
- Mission
- Mistral
- MiTAC
- Mitek
- Mitel
- Mitsubishi
- Mitsubishi Electronics
- Mitutoyo
- MIU France
- MMATS Professional Audio
- Mobile Crossing
- Mobile Edge
- Model Shipways
- Moderno
- Modulaire
- Moen
- Moffat
- MoistAir
- Monarch
- Monessen Hearth
- Mongoose
- Monitor Audio
- Monster
- Monterrey
- Moog
- Morel
- Morphy Richards
- Mosquito Magnet
- Motion
- Motorola
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- Moulinex
- Moultrie
- Mountain Buggy
- Mountain Hardwear
- Mountfield
- Moxa Technologies
- Moyer Diebel
- MPC
- Mr Handsfree
- Mr. Coffee
- Mr. Heater
- MSC
- MSi
- MSR
- MTD
- MTX Audio
- Multi-Link
- Multiquip
- Multitech
- Munchkin
- Muratec
- MURO
- Murphy
- Murray
- Music Hall
- Musica
- Musical Fidelity
- Mustang
- Mustang Survival
- Mustek
- Mvix
- MXL