Contents:
- Marconi
- MDB Systems
- MDS Data Processing
- Mechtric Eng. Ltd
- Megatek Corporation
- Melcom Systems (UK)NAHC/TC56
- MEL Equipment Ltd
- Mellordata
- Membrain
- Memorex
- Merck & Hollander Ltd
- Metals Research Ltd
- Metropolitan Vickers
- Microcell Electronics
- Microcomputer Associates Inc
- Micro Computer Systems Ltd
- Micro Consultants
- Microfilm Equipment (Mfg) Ltd
- Micromation Ltd
- Microsystem Services
- Microtecnica
- Midac