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Mainframe computers are generally used in big organisations where a large amount of data is
                  used, such as banks. Examples of mainframe computers are IBM zSeries, IBM 4381, ICL 39, etc.
                                                                   Supercomputers

                                                                   Supercomputers are the largest and fastest of all
                                                                   types of computers. It consists of a large number
                                                                   of processors and also occupies a huge amount of
                                                                   space. The cost of a supercomputer is very high. It
                                                                   can process a very large amount of data quickly. It
                                                                   is a very powerful machine for performing complex
                                                                   scientific calculations. Calculations that a personal
                                                                   computer performs in three weeks can be performed
                                                                   by a supercomputer within a minute.
                                Supercomputers
                  They are used in very big organisations and government departments to do tasks such as weather
                  forecasting and rocket launching. PARAM was India’s first supercomputer, developed in 1991.
                  Some other examples of supercomputers are PACE, Titan, Sunway TaihuLight, Pratyush, Mihir, etc.

                   i +  SOME OTHER SPECIAL COMPUTERS

                  Apart from the types of computers that we have discussed in the previous sections, some other
                  types of computers are embedded computers and handheld computers. Let us learn about these
                  computers in detail.
                  Embedded Computers

                  An embedded computer is a special type of microprocessor-based system that is developed
                  for performing a specific task. It is different from a general-purpose computer like a PC. Today,
                  embedded computers are used in various applications. Some commonly used examples of the
                  embedded computers are the digital camera, microwave, ATM, etc. Let us learn about some of

                  these embedded computers in detail.
                  Digital Camera

                  A digital camera captures image or picture momentarily and
                  converts the image directly into digital form and stores in memory.
                  It can then be viewed on the computer or compatible devices.
                  It is available in various models with different specifications that
                  include pixels, sizes and memory. The quality of image captured
                  by digital camera is measured in pixels.                                        Digital Camera

                                                         ATM

                                                         An Automated Teller Machine (ATM) is another example of
                                                         an embedded computer that allows us to withdraw money
                                                         from our bank account anywhere and anytime. This machine
                                                         is connected to the bank’s server. When we withdraw some
                                                         money from an ATM an equal amount is debited from our
                                 ATM                     bank account.


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