Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,360 pages of information and 233,518 images on early companies, their products and the people who designed and built them.
of Nottingham, and Glasgow
1882 William Seward Burroughs conceived the idea of an adding machines
1898 Company founded in USA
1905 Burroughs Adding Machine Company was incorporated in Michigan
Also see Burroughs Adding and Registering Machine Co of Nottingham
1909 Private company, Burroughs Adding Machines Ltd, was incorporated in Britain, a wholly-owned subsidiary of the US company
1910 Exhibited 86 types and sizes of adding machine at Olympia
1961 Manufacturers of adding, calculating, bookeeping and other office machines. 
1961 Name changed to Burroughs Machines Ltd
1974 Introduced C7200 series of calculators.
1986 Merged with Sperry Rand to form Unisys Corporation.