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3                            Input and Output






                                                                       Devices








                          Chapter Profile

                            Input Devices
                            Output Devices
                            Storage Devices




                 A computer  is made up of many parts.  These parts  are  categorised  into three

                 groups:

                   1.  Input Devices         Æ  Keyboard, Mouse, Scanner, etc.
                   2.  Output Devices  Æ  Monitor, Printer, Speakers, etc.

                   3.  Storage Devices  Æ  Hard Disk, Compact Disc, Pen Drive, etc.


                      INPUT DEVICES

                 The devices that are used to give commands or instructions to the computer or tell

                 the computer what to do are called input devices. Some of the input devices are:

                 Keyboard



















                                                              Keyboard
                 A keyboard is an input device that is used to give instructions to the computer by
                 typing text and numbers. It has buttons called keys. A standard keyboard has 104 keys.



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