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Lesson 4 data processing


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Lesson 4 data processing

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