CLASSIFICATION OF COMPUTERS<br />Acc to function<br /><ul><li>Analog computer
Digital computer
Hybrid Computer
ANALOG COMPUTERS are that in which data varies continuously i.e. the movement of data is continuous.</li></ul>Represented ...
Broadcast transmission</li></ul>Example<br />Automobile Speedometer, Voltmeter, etc<br /><ul><li>DIGITAL COMPUTERS are tho...
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Classification of computers

  1. 1. CLASSIFICATION OF COMPUTERS<br />Acc to function<br /><ul><li>Analog computer
  2. 2. Digital computer
  3. 3. Hybrid Computer
  4. 4. ANALOG COMPUTERS are that in which data varies continuously i.e. the movement of data is continuous.</li></ul>Represented by: series of waves<br />Used for<br /><ul><li>Measuring temperature, pressure, etc
  5. 5. Communication
  6. 6. Broadcast transmission</li></ul>Example<br />Automobile Speedometer, Voltmeter, etc<br /><ul><li>DIGITAL COMPUTERS are those computers in which data flows in discrete form.</li></ul>Represented by: pulses, two series i.e. 0s & 1s<br />Used for<br /><ul><li>Mathematical calculations
  7. 7. Compare values
  8. 8. Storing the result</li></ul>Example<br />Digital watch, Education system, business purpose<br /><ul><li>HYBRID COMPUTERS are combination of both analog computer and digital computer</li></ul>MEASURES: both continuous and discrete form of data<br />Example <br /><ul><li>STD/PCO phone, where one communicate with a person using analog computer & the rate as charges and pulse rate is measured in forms of digit.
  9. 9. Measuring heart beat or ECG system in ICU in a hospital</li></ul>In Digital computer, classification can be done on the basis of purpose<br />General Purpose Computer<br />Special Purpose Computer<br />General Purpose Computer: These are designed to perform the variety of jobs or applications for this reason; they are less efficient than special purpose computers.<br />Example<br />Banking, Sales Analysis, PCs, etc<br />Special Purpose Computer: These are designed to meet the needs of some special application. They are designed to perform a single job. So they execute a task quickly and more efficiently. Program and instructions are stored permanently in them.<br />Example<br />Weapon designing<br />ACC TO SIZES<br /><ul><li>Super Computer
  10. 10. Mainframe Computer
  11. 11. Mini Computer
  12. 12. Micro Computer
  13. 13. Desktop Computer
  14. 14. Pocket Computer</li></ul>Super Computer<br />Purpose: Special purpose computers handle mostly complex scientific, statistical applications or programs.<br />Key Features<br /><ul><li>High technology
  15. 15. High capacity memory i.e. 8.4 million
  16. 16. Computes data processing in short time
  17. 17. Highly sophisticated technology
  18. 18. Cost varies from 1 million to 5 million</li></ul>IMAGE<br />Example<br />India’s first super computer is PERM<br />Drawback<br /><ul><li>Operating Supercomputer requires highly qualified staff.
  19. 19. Experts were required for such computer engineering.
  20. 20. They are sensitive to temperature, humidity, dust, etc.
  21. 21. Non portability & large size</li></ul>Mainframe Computers<br />Key features<br /><ul><li>Smaller size than super computer
  22. 22. Large memory capacity
  23. 23. Allows networking of up to 100 terminals
  24. 24. Cost varies from 5-20 lacs.</li></ul>IMAGE<br />Example<br />PDP-370, IBM 40<br />Disadvantages<br /><ul><li>Experts and highly qualified professionals were required to operate it
  25. 25. Sophisticated technology required for manufacturing & assembling the computer</li></ul>Mini Computer<br />Key features<br /><ul><li>Higher processing speed than lowest category computer but slower than super computer & Mainframe computer
  26. 26. Portable computers because of smaller size
  27. 27. Memory capacity RAM is up to 128 MB
  28. 28. Secondary Memory store 40 GB
  29. 29. Costs around Rs 50 thousand to 90 thousand</li></ul>Example<br />PDP-11 and PDP-45<br />Disadvantages<br /><ul><li>Cannot connect all hardware devices
  30. 30. Cannot execute all languages and software</li></ul>MICRO COMPUTER<br />Key features<br /><ul><li>Smaller than Mini Computer
  31. 31. High speed computer but slower than mini computer
  32. 32. Costs around Rs 30000 to 60000
  33. 33. Portable
  34. 34. RAM requires 64 MB to 128 MB
  35. 35. Limited languages FORTRAN, Basic, COBOL, Pascal can be executed</li></ul>Example<br />Uptron, HCL, PCL, Wipro, PCs, HP, PC-AT, PC-XT<br />Drawbacks<br /><ul><li>Limited Hardware devices can be connected
  36. 36. Experts were required</li></ul>Desktop Computers<br />Purpose: Education system and small scale industry<br />Called: HOME or Briefcase Computers<br />Key features<br /><ul><li>Portable
  37. 37. High speed processing processor varies from 80286 to 80586
  38. 38. Requires RAM from 16 MB to 64 MB
  39. 39. Internet facility for communication
  40. 40. Costs around Rs 30,000 to Rs 60,000</li></ul>IMAGE<br />Example<br />HCL, PCL, Wipro, COMPAQ, HP, LEO, SAMSUNG, etc<br />Disadvantages<br />Execute limited software and languages related to windows based<br />Pocket Computer<br />Key features<br /><ul><li>Small in size
  41. 41. Portable like a digital diary
  42. 42. Requires RAM maximum up to 1GB
  43. 43. Disk capacity is 80 GB</li></ul>IMAGE<br />Disadvantage<br />Execute limited Software<br /> <br />