Contents:
- Midland Business Machines
- Midlectronic Ltd
- Mills Associates Ltd
- MiniComputer Systems Ltd
- Minitronics International Ltd
- Minster Automation Ltd
- Mitsubishi Electric Corporation
- Modular Computer Systems
- Modular Technology
- Mohawk
- Monolithic Memories Inc.
- Monotype Corporation
- Monroe
- Moore Paragon
- MooreReed
- Motorola Semiconductor Products
- MPL Mfg Processes Ltd
- MRI Systems
- MSI Data CorporationPerex Ltd
- Muirhead
- Muldivo