Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,100 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
United Peripherals Ltd (UPL) of Winsford, Cheshire
A joint venture with Control Data Corporation of USA
c.1980 Company established by BTG to manufacture and sell computer peripherals, initially based on Control Data products.