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Desktop Computer

            A desktop is primarily used in offices and at homes. It is designed
            to fit comfortably on a desk.



                                    Laptop

                                    A laptop is a portable computer that you can keep on your lap. You can
                                    carry a laptop anywhere, therefore, you are not restricted to one place as
                                    you are while working on a laptop.

            Tablet

            A  tablet  is  a kind  of microcomputer  that  offers new features  to  the
            IT-savvy world like a touchscreen. It is available in a variety of sizes and
            has an in-built virtual keyboard and a battery.


                        Smartphone

                        It is a mobile phone built on a mobile operating system. It provides additional features
                        to perform day-to-day tasks including sending emails and accessing the Internet.




            Minicomputers

            Minicomputers are more powerful than microcomputers. They are bigger
            in size and faster in processing speed. They can support several users
            working at the same time on the same machine, which means they support
            a multi-user environment. Some common examples are  HCL Magnum,
            VAX7500, etc.


                                         Mainframe Computer

                                         A mainframe computer is a massive computer that occupies a huge
                                         space and often fills an entire room. It can store an enormous amount
                                         of information  and  is  designed  for multitasking with  several users
                                         working simultaneously. Mainframe computers usually have several
                                         terminals connected to them. They are manufactured for commercial

            applications and other large-scale computing purposes.

            Supercomputer
            A  supercomputer  consists  of a  large number  of processors  and  also

            occupies  a  huge  amount  of  space.  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.


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