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Types of Computers

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Types of computers are based upon the purpose, functioning and size of the computer. Accordingly they are classified into four types:

  • Super computers
  • Mainframe computers
  • Mini computers
  • Micro computers

Super computers

  • Most powerful computers characterized as fastest, very high processing speed and of large data storage.
  • Specifically used for complex applications by big organization.
  • Good example is NASA and ISRO uses supercomputers to track and control space discovery.

Mainframe computers

  • Capable of performing high processing speed and data storage but not powerful as super computers.
  • Wired in air-conditioned rooms.
  • Example: ISP providers use mainframe computers to process information about millions of internet users.

Mini computers

  • Less processing speed than mainframe computers.
  • Departments of large company's uses this type of computers.
  • They can handle large database and accounting efficiently.
  • Example: Department of computer monitoring the network traffic of whole company.

Micro computers

  • Least powerful type of computers but are the most widely used and growing in the fastest rate.
  • Hardware peripherals can be attached easily.
  • Includes Desktop computers, Laptops, tablet pc's, Personal Digital Assistants(PDA) etc.

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Tip Box

Buying new/used computer

New

My recommendation

  • Processor: 64 bit with 2 GHz clock or more
  • RAM: 2 GB or more
  • Hard disk: 320 GB or more
  • Monitor: 17 inch or more
  • Operating System: Linux or Windows
  • Software: Driver CD and free antivirus
  • Get all these information from various vendors and choose the best one, which is of high configuration and low price.

Used

  • Verify any physical damage inside and outside the cabinet.
  • Check all specifications provided to you are correct.
  • Take drivers CD's and warranty receipt if available.
  • At last is to check, whether all things are working properly.

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