The History of Computers

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• The History of Computers
• Dr. Ray Cafolla

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Ancient Computers

• Fingers and toes
• Stones
• Abacus (3000 bc)

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The Abacus
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The Forerunners of Computers

• 1620 Napier's bones
• 1642 Blaise Pascal (Pascaline)

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The Forerunners of Computers

• 1670 Leibnitz Stepped Reckoner

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Babbage's Analytical Engine (1833)
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Jacquard's Loom (1810)
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Herman Hollerith (1880)Punched Cards
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Three Generations of Computer

• 1951-1958 first generation (vacuum tubes)

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Three Generations of Computer

• 1959-1964 second generation computer (transistors)

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Three Generations of Computer

• 1965-1970 third generation computers (integrated
  circuits ICs)

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Atanasoff-Berry Computer (ABC - 1939)The First
Computer
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Mark I (1944)First American Programmable Computer
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ENIAC (1946)Electronic Numerical Integrator And
Calculator
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The Post War Boom

• Johnny von Neuman (1945)
• Alan Turing (1946) Enigma

• 1951 UNIVAC (Universal Automatic Computer)

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Modern Computers

• 1965 Third generation computers
• 1975 Fourth generation computers
• (Microcomputers)
• Now Multimedia, artificial intelligence

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The History of Computers
The End