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Robert Asztalos - Calculator Timeline
20 Oct 2017
Abacus (2700-2300 B.C.) The Abacus was an early calculating tool. It worked by shifting balls along a pole of metal.
Blaise Pascal (June 19, 1623 - August 19, 1662) Born in Clermont-Ferrand, France
Pascaline (1645) The pascaline is a mechanical calculator. The calculater featured mechanical wheels with spokes labeled 0-9. To input a number, the user would place a stylus in the corresponding place between the spokes.
Gottfried Wilhelm Leibniz (July 1, 1646 - Nov 14, 1716 Lived in the Holy Roman Empire.
Leibniz Machine (1671) Was a mechanical machine that represented numbers in decimal form. Did multiplication by repeated addition and shifting.
Binary Code (1679) Uses a two-symbol system, like 0 & 1, to represent numbers and letters. Assigns a pattern of binary digits (bits) to each character.
George Boole (Nov 2, 1815 - Dec 8, 1864) Born in Lincoln, lincolnshie, England.
Boolean Algebra (1847) First seen in George Boole's book, "The Mathematical Analysis of Logic," it a branch of algebra In which the values of the variables are the truth values true and false, usually denoted 1 and 0 respectively. Normal Prime operators, (+,-) are replaced by conjuctions, denoted as ∧ and ∨.
Charles Babbage (1791 - 1871) A mathematician, and philosoper.
Babbage's Difference Engine No. 1 First automated calculator. Was an engineering marvel.
Hermin Hollerith (1860 - 1929) Born in Buffalo New York.
Tabulator A machine that was able to hold information. Used punched out cards.
Vannevar Bush (1890 - 1974) Born in Everett, Masachusetts.
Rockefeller Differential Analyzer (1942) Electronic version of the Differential Analyzer. Used over 200 miles of wire.
Claude Shannon (1916 - 2001) Born in Petoskey, MI. He created the first digital circuit.
Alan Turing (1912 - 1954) Born in Maida Vale, London, England. Created what many called the first general purpose computer.
Konrad Zuse (1910 - 1995) Born in Berlin, Germany Created the first programmable computer
John Atanasoff and Clifford Berry (1903 - 1995) (1918 - 1963) John A. - Born in Hamilton, NY. Invented the first electronic digital computer. Clifford Berry - Born on Gladbrook, IA. Helped create the digital computer.
Howard Aiken (1900 - 1973) Born in Hoboken, NJ.
Harvard Mark 1 (1944) Was a general purpose electromechanical computer. Build from switches, relays, rotary shafts, and clutches. Could exucute long computations automatically.
John Mauchly J. Presper Ecker (1919 - 1995) Born in Philadelphia, PA Electronic Numerical Integrator And Computer (ENIAC)
The Triathlon of People John Bardeen - (1908-1991) Born in Madison WI Walter Brattain - (1902-1987) Born in China Amoy William Shockley - (1910 - 1989) Born in Greater London. They all worked on superconductors, and transistors.
Federico Faggin - (1941 - Present) Marcian Edward Hoff - (1937 - Present) Worked to create the microprocessor.
Ed Roberts (1941 - 2010) Born in Miami, Florida. Invented the first commerical super computer.
Steve Wozniak (1950 - Present) Born in San Jose, CA. Co-founded Apple.
Apple I (1976) Apple's first home electronic computer.
Apple II (1977) First mass prodiced 8-bit microcomputer.
Gary Kildall (1942 - 1994) Born in Seattle, WA. Founded Digital Research, and made the CP/M operating system.
Bill Gates (1955 - Present) Born in Seattle, WA. Created Microsoft, which would grow to be the largest operating system in the world.
Alan Kay (1940 - Present) Pioneered object- oriented programming. Born in Springfield, MA.
Steve Jobs (1955 - 2011) Born in San Francisco, CA. Co-founded Apple, and the company led technology innovations.
Bob Metcalfe (1946 - Present) Born in Brooklyn, NY. Founded 3com, and formulated Metcalfe's law.
Tim Berners-Lee (1955 - Present) Born in London, UK. Created the World Wide Web
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