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Computer History

Timeline Notes

InventorInvention/How does it work?
Blaise Pascal (1623-1662) In 1642 he designed a mechanical calculating device called Pascaline that only performed addition and the device never worked properly.
Gottfried Wilhem von Liebniz (1646-1716) In 1670 he invented a digital mechanical calculator called the Stepped Reckoner,The machine does multiplication by repeated addition, and division by repeated subtraction.
Charles Babbage (1792-1871) In 1842 he invented an analytical engine-calculating machine that used punch cards to store information.
Herman Hollerith (1860-1929) In 1890 he invented the tabulating machine that used electricity instead of gears and to perform the calculations.It was developed to help process data and assist people in summarizing information.
John Atanasoff (1903-1995) Clifford Berry (1918-1963) In 1939 him and his colleague invented the Atanasoff-Berry computer (ABC) that used binary number system used in computers today.It was also the first automatic electronic digital computer
Howard H. Aiken (1900-1973) In 1944 he invented the Mark 1(ASCC which was the first large-scale automatic digital computer, that was considered the first universal calculator.
John Mauchly (1907-1980) J. Presper Eckert (1919-1995) In 1946 invented an Electronic Numerical Integration and Calculator (ENIAC) solves mathematical problems much more faster and was originally a military project that was top secret. it was programmed to solve a large class of numerical problems
Alan Turing (1912-1954) In the late 30s and 40s he developed and idea of a universal machine called the turing machine.
Jon von Neuman (1903-1957) In 1947 he invented the EDVAC (Electronic Discrete Variable Automatic Computer) with Mauchly and Eckert. It was one of the earliest computers.
William Shockley (1910-1989) John Bardeen (1908-1991) Walter Brattain (1902-1987) In 1947 they invented the transistor that replaced many tubes, making computers smaller, less expensive, and reliable.
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