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Computer Science  have millions  of users using   power of supercomputers  and the need for
                                             cooling  systems  means  they  require  more
          computers concurrently. Figure
                                             electricity  to operate. Figure 2.6 shows  an
          2.5 shows a mainframe computer.
                                             example of a supercomputer.

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             Figure 2.5: Mainframe computer

                                                   Figure 2.6: Example of a supercomputer
          Supercomputers
          Supercomputers are the most        Classification based portability
          powerful and most expensive        Computers can be classified according to this
          computers. They are used for jobs   criterion  as desktops, laptops, notebooks,

          requiring massive computational    palmtops, and tablet computers.
          power, like weather forecasting
          and      engineering      design.  Desktop computers
          Supercomputers    have    higher   A desktop computer (see Figure 2.2 (a)) is a
          processing  speeds  than  all  other
          computers.  These computers use    personal computer intended for regular use at a
          multiprocessing  techniques to     single location on a desk or table due to its size
          do their job. The main difference   and power requirements. It is designed to fit
          between    supercomputers    and   conveniently on top of a typical office desk. In
          mainframes is that supercomputers   businesses and increasingly at home, desktop
          channel all their power into       computers can be interconnected  and can
          executing  a few programs as       share resources such as printers. To share the
          fast as possible.  In contrast,    resources, they must be connected to a Local
          mainframes use their power         Area Network (LAN),  Wide  Area Network
          to execute  multiple  programs     (WAN) and  the  Internet.  The  connection  is
          concurrently.  Like  mainframe     through  cables or a  wireless  network,  also
          computers,  the  high  processing   known as Wireless Fidelity (Wi-Fi).


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