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Computer History


Blaise Pascal invented pascaline in 1642; performs only addition; never worked properly
Gottfried Wilhelm von Leibniz invented the stepped reckoner in 1670; first to employ function; add, multiply, subract and divide
Charles Babbage analytical engine-calculating machine that used punched cards to store information in 1842; ada byron: 1815-1852 evaluates any mathematical formula
Herman Hollerith invented the tabulating machine in 1890
John Atanasoff & Clifford Berry ABC used binary number system used in computers today; 1939
Howard Aiken 1944; Mark 1
John Mauchly ENAC; 1946
Alan Turning Turing Machine; 1930 or 1940
Jon von Newmann EDVAC
William Shockley, John Bardeen, Walter Brattain Transistor; 1947
Jack Kilby First Integrated Circuit
William Gates III Microsoft
Thomas and John Knoll Adobe Photoshop; 1988
Adam Fischer Prezi
Created by: mariavanessa