n2000 B.C.: Abacus first used in computation
n1642 A.D.: Blaise Pascal (French) creates a mechanical adding machine -- the “Pascalene” -- for tax computations
n 1842 A.D.: Charles Babbage designs analytical engine to perform calculations automatically; Ada, countess of Lovelace, programs this machine
n1890 A.D.: Herman Hollerith designs census recording system that uses punched cards; starts a company that later becomes IBM
n1939 A.D.: John Atanasoff designs and builds first electronic digital computer (w/ graduate
student Clifford Berry); called the ABC
n1946 A.D.: J. Presper Eckert and John Mauchly design and build the ENIAC; considered the first modern computer, used vacuum tubes
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