The Burroughs Corporation began in 1886 as the American Arithmometer Company in St. Louis, Missouri selling an adding machine invented by William Seward Burroughs. The company moved to Detroit in 1904 and changed its name to the Burroughs Adding Machine Company, in honor of Burroughs, who died in 1898. Burroughs grew into the biggest adding machine company in America, although by the 1950s it was selling more than the basic adding machines, including typewriters and computers. The Company developed a range of adding machines with different capabilities and created the office accounting machine range that began with the Sensimatic, which had a moving programmable carriage to maintain ledgers. It could store 9, 18 or 27 balances during the ledger posting operations and worked with a mechanical adder named a Crossfooter. The Sensimatic developed into the Sensitronic which could store balances on a magnetic stripe which was part of the ledger card. This balance was read into the accumulator when the card was inserted into the carriage. The Sensitronic was followed by the E1000, the E2000, E4000, E6000 and the E8000 which was computer system supporting magnetic tape, card reader/punches and a line printer. In the late 1960s the D2000, D4000 range was produced - also known as the TC500 (Terminal Computer 500) which had a golf ball printer and a 1K (80 bit) disk memory. These were popular as branch terminals to the B5500/6500/6700 Systems, which sold well in the Banking Sector, where they were often connected to non-Burroughs mainframes. Later, this group became known as the BUNCH - (Burroughs, UNIVAC, NCR Corporation, Control Data Corporation, and Honeywell) In September 1986, Burroughs Corporation merged with Sperry Corporation to form Unisys. (via Wikipedia)