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COMPUTERS OF THE PAST

COMPUTERS OF THE PAST. By Leif Fossmo. THE VACUUM TUBE (1951-1958). Created in 1947 by Mauchly and Eckert, called the ENIAC Used to calculate the U.S. census Small electronic tubes the size of lightbulbs were used to calculate data

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COMPUTERS OF THE PAST

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  1. COMPUTERS OF THE PAST By Leif Fossmo

  2. THE VACUUM TUBE (1951-1958) • Created in 1947 by Mauchly and Eckert, called the ENIAC • Used to calculate the U.S. census • Small electronic tubes the size of lightbulbs were used to calculate data • Magnetic cores consisting of tiny donut-shaped rings which were strung on intersecting wires provided memory, until 1957 when magnetic tape was created Home

  3. THE TRANSISTOR (1959-1964) • Small device that transfers electonic signals across a resistor, created in 1947 by John Bardeen, Walter H. Brattain, and William Shockley • Revolutionized electronics, computers in particular • Much smaller than vacuum tubes, needed no warm-up time, consumed less energy, generated less heat, more reliable • Incorporated into computers in the late 1950s Home

  4. THE INTEGRATED CIRCUIT (1965-1970) • Complete electronic circuit on a small chip of silicon • Silicon is one of the earth’s most abundant elements and is found in common beach sand as well as almost all rocks and clay • Silicon is a crystaline substance that conducts an electric current when it has been doped with chemical impurities • IBM 360 series was the first to take advantage of these new integrated circuits Home

  5. THE MICROPROCESSOR (1971-NOW) • Microprocessor became the evolved form of the integrated circuit • Became commercially available in 1971 Home

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