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Lesson 3 data processing

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Transcript

  • 1. Data Processing
    Lesson 3
  • 2. 3-1 The History of Computers
    3-2 The Earliest Computing Devices
    1. Abacus
    2. Napier’s Bones
    3. Oughtred’s slide rule
    4. Pascal’s Calculator
    5. Leibnir’s Calculator
    6. Babbage’s analytical Engine
    7. Hollerith’s Punched-card Machine
  • 3. 3-1 History of Computers
    Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. They are:
    Manual mechanical
    Eletromechanical
    Electronic
  • 4. Manual-mechanical : A simple mechanism powered by hand
    Abacus
    Slide rule
    Electromechanical: It is usually powered by an electric motor and uses switches and relays.
    Household electrical appliances
    Calculators
    Punched cards
  • 5. Electronic : a device which has its principal components circuit boards, transistors or silicon chips and the like
    Modern digital computer
  • 6. 3-2 The Earliest Computing Devices
    Abacus
  • 7. 3-2 The Earliest Computing Devices
    Napier’s Bones
  • 8. 3-2 The Earliest Computing Devices
    3. Oughtred’s Slide Rule
  • 9. 3-2 The Earliest Computing Devices
    4. Pascal’s Calculator
  • 10. 3-2 The Earliest Computing Devices
    5. Leibniz’s
    Calculator
  • 11. 3-2 The Earliest Computing Devices
    6. Babbage’s Analytical Calculator
  • 12. 3-2 The Earliest Computing Devices
    7.Hollerith’s Punched-card Machine