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COMPUTER SYSTEM


                 A computer system is made up of many parts. Each part of
                 the computer performs a different task. The computer system
                 is made up of two types of parts—Hardware and Software. The
                 parts of a computer that we use to work with the computer are
                 called devices.



                        COMPUTER HARDWARE


                 The parts of a computer that we can see and touch are called Hardware. All input, processing,
                 output and storage devices form the hardware components of a computer system. For example,
                 keyboard, mouse, etc.

                 The hardware components are divided into four groups.


                                                               Hardware



                                                        Processing     Output        Storage
                                         Input Devices
                                                          Device       Devices       Devices

                      Input Devices

                 The devices that are used to enter data into the computer and give orders are called input devices.
                 Let us study about some of the commonly used input devices.


                 Keyboard

                 A  keyboard is  used  to  give  input  to  the  computer  by  typing
                 numbers, letters and special characters.




                                         Mouse
                                         A mouse is used to send instructions to the computer with the click of a
                                         button. It is also used to draw pictures and select objects in the computer.

                                         It is also called a pointing device.



                 Scanner

                 A scanner is used to read paper documents, images or pictures and send
                 them as input into the computer.






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