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    Desktop Computer

                      A desktop is primarily used in offices and in 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 desktop.

                      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
                                  for 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,
                      VAX 7500, etc.

                                                   Mainframe Computer
                                                   A mainframe computer is a massive computer that occupies a
                                                   huge amount of 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 multiple 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 in minutes.

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