History
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History. Computers. Development of Computers. Abacus (500 BC). Pascaline (1642) - Blaise Pascal. Punch cards (1801) - Joseph Jacquard. Difference Engine/Analytical Engine (1822) - Charles Babbage. First programmer - Ada Augusta Lovelace. Census Bureau (1890) - Herman Hollerith.

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History

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History

Computers


Development of Computers

  • Abacus (500 BC)


  • Pascaline (1642) - Blaise Pascal


  • Punch cards (1801) - Joseph Jacquard


  • Difference Engine/Analytical Engine (1822) - Charles Babbage


  • First programmer - Ada Augusta Lovelace


  • Census Bureau (1890) - Herman Hollerith


  • ABC by Atanasoff & Berry


General Purpose Computers

  • ENIAC by Mauchly & Eckert

    • First computer based entirely on vacuum tubes


EDVAC by von Neumann

Improved programming requirements of ENIAC

Stored program concept


First Generation

  • 1951 – 1958

  • Vacuum tubes

  • UNIVAC I (1951)

    • First computer built for a data processing application

  • Punched cards

  • Machine language being replaced by assembly language

  • FORTRAN


Vacuum Tubes


Second Generation

  • 1959 – 1963

  • Transistors

  • DEC introduced PDP-1 (1960)

    • First minicomputer

  • IBM began work on System 360 series (1961)

  • Magnetic tapes and disks

  • COBOL, Basic, and PL1


Transistors


Third Generation

  • 1964 – 1970

  • Integrated circuits

    • Circuits reside on a single chip

  • IBM introduced System 360 series (1964)

  • RPG and Pascal


Integrated Circuits


Fourth Generation

  • 1971 – ???

  • LSI and VLSI

    • Many circuits on a single chip

  • Development of microprocessor by Intel (1971)

    • Ted Hoff

  • MITS, Inc. – first commercially successful microcomputer (1975)

  • Apple II (1977), Tandy’s TRS-80 (1979), IBM PC (1981)

  • Ada


LSI


? Next Generation ?


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