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•   Digital: It refers to a computer that uses digits (binary numbers 0’s and 1’s) to
                    generate, process, and display data. The results produced by digital computers

                    are more accurate than those of analog computers. All the modern computers
                    that we currently use, like desktops, laptops, and smartphones, are examples
                    of digital computers. Some other examples of digital computers are digital
                    watch, digital thermometer, electricity meter, etc.
                                                                                                     A Digital Computer
                  •   Hybrid: It refers to a computer that provides the functionality of both,

                    an analog and a digital  computer while processing and displaying
                    data. It uses the speed of an analog computer and the accuracy of
                    a  digital  computer.  These  types  of  computers  are  generally  used
                    in  scientific  research  and  specialised  applications.  The  heartbeat
                    measuring machine used in hospitals is the most  common example
                    of a hybrid computer.                                                        A Hybrid Computer

                  Purpose

                  On the basis of their purpose, computers can be of two types:
                  •   General Purpose Computer: It refers to a computer that can perform different kinds of jobs
                    with equal efficiency. Personal computers, including desktops, notebooks, smartphones, and
                    tablets, are all examples of general-purpose computers.

                  •   Special Purpose Computer: It refers to a computer that is used for a specific purpose. It
                    does its single task very quickly and cannot be used for any other purpose. These types of
                    computers are generally used for controlling the process of manufacturing and for weather
                    forecasting systems.

                  Size, Speed, Processing Power and Cost

                  Computers  differ  in  size,  processing  power,  speed,  and  cost.  On  the  basis  of  these  factors,
                  computers can be categorised as follows:
                  Microcomputer

                  A microcomputer is a type of computer that has one microprocessor as its processing unit. It is
                  a small and less expensive digital computer. This type of computer is made to be used by a single

                  user at a time. A Microcomputer is also called a Personal Computer (PC). Some examples of
                  microcomputers are:
                  •   Desktop: A desktop is primarily used in offices and at homes.

                    It  is  designed  to  fit  comfortably  on  a  desk.  It  is  a  personal
                    computer developed for regular use and generally placed in a
                    single location on a desk or table. All its components, such as
                    a keyboard, mouse, and storage devices, are connected using
                    wires or wirelessly. Due to its size and power requirements, we
                    cannot carry this type of computer. Desktop computers are                         Desktop
                    generally used in schools, colleges, offices, etc.



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