Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,645 pages of information and 247,064 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
of Hemel Hempstead
1969 Business incorporated, a subsidiary of Computer Machinery Co
1983 Name changed to Microdata Information Systems
1985 Became McDonnell Douglas Information Systems
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