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Lesson 4 data processing

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  • 1. Data Processing
    Lesson 4
  • 2. 4-1 Early Developments in Electronic Data Processing
    4- 2 Mark 1
    4 - 3 The Eniac
    4 - 4 The Edvac
    4 – 5 Computer Generations
    4 – 6 First Generation Computers
    4 – 7 Second Generation Computers
    4 – 8 Third Generation Computers
    4 – 9 Fourth Generation Computer
  • 3. Mark I
    Howard Aiken began work on the Mark I at Harvard University
    Mark I digital computer was completed in 1944
    Mark I official name was Automatic Sequence Controlled Calculator.
    Mark I functions:
    Could perform arithmetic operations
    Could locate information stored in tabular form.
  • 4. Mark I
    Processed numbers up to 23 digits longs and could multiply three eight-digit numbers in 1 second.
    It was not an electronic computer but as rather an electromechanical one
  • 5. THE ENIAC
    ENIAC – Electronic Numerical Integrator and Calculator
    ENIAC was developed by Presper Eckert Jr. aand John Mauchly from 1943 to 1946.
    It has 18,000 vacuum tubes and required the manual setting of switches.
    It could perform 300 multiplications per second
  • 6. The EDVAC
    EDVAC is the modified version of ENIAC
    EDVAC – Electronic Discrete variable automatic Computer
    EDVAC employs binary arithmetic
    John von Neumann invented the EDVAC
  • 7. Computer Generations
    First Generation Computers
    Second Generation Computers
    Third Generation Computers
    Fourth Generation Computers
  • 8. First Generation Computers ( 1951-1959)
    The use vacuum tubes in place of relays as a means of storing data in memory and the use of stored-program concept.
    It requires 3.5 KW of electricity per day to keep the vacuum tubes running
  • 9. Second Generation Computers ( 1959-1964)
    Solid-state components ( transistors and diodes) and magnetic core storage formed the basis for the second generation of computers
  • 10. Third Generation Computers ( 1965-1970)
    Integrated solid-state circuitry, improved secondary storage devices and new input/output devices were the most important advances in this generation.
  • 11. Fourth Generation Computers ( 1970 to present)
    The major innovations were in the development of microelectronics and in the development of different areas in computer technology such as: multiprocessing, multiprogramming, miniaturization, time sharing , operating speed and virtual storage.
  • 12. The Edvac

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