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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

History

Computers

general purpose computers
General Purpose Computers
  • ENIAC by Mauchly & Eckert
    • First computer based entirely on vacuum tubes
slide12
EDVAC by von Neumann

Improved programming requirements of ENIAC

Stored program concept

first generation
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
second generation
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
third generation
Third Generation
  • 1964 – 1970
  • Integrated circuits
    • Circuits reside on a single chip
  • IBM introduced System 360 series (1964)
  • RPG and Pascal
fourth generation
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
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