Lesson 3 data processing

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Lesson 3 data processing

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

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