The History of Computing

In 500 B.C. the abacus was first used by the Babylonians as an aid to simple arithmetic. In 1623 Wihelm Schickard (1592 - 1635) invented a "Calculating Clock". This mechanical machine could add and subtract up to 6 digit numbers, and warned of an overflow by ringing a bell. J. H. Mueller comes up with the idea of the "difference engine", in 1786. This calculator could tabulate values of a polynomial. Muellers attempt to raise funds fails and the project was forgotten. Scheutz and his son Edward produced a 3rd order difference engine with a printer in 1843 and their government agreed to fund their next project.
In 1886 Dorr D. Felt (1862 - 1930) invented the "comptometer". This was the first calculator where the operands are entered by just pressing keys. In 1889 in also invents the first printing desk calculator.
Herman Hollerith (1860 - 1929) founded IBM ( as the Tabulating Machine Company ) in 1896. The company renames known as IBM in 1...