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Computer History

Timeline

InventorInvention
Blaise Pascal 1623-1662 Invented a mechanical calculating device called Pascaline. 1642 Device performs only addition. Device never worked properly.
Gottfried Wilhelm von Leibniz 1646-1716 Invented the stepped Reckoner in 1670. Device was supposed to add, multiply, subtract and divide but malfunctioned.
Charles Babbage 1792-1871 Analytical Engine-calculating machine that used punched cards to store information in 1842. Chief Collaborator was Ada Byron 1815-1852.
Herman Hollerith 1860-1929 Invented the tabulating machine in 1890. Used electricity instead of gears to perform calculations.
Created by: Vilma Taimanao