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    COMPUTER HARDWARE

                      The term ‘hardware’ refers to the parts of a computer that we can see and touch.

                      In other words, hardware are the tangible parts of a computer system.
                       The Hardware devices are classified into four categories:

                                                                 HARDWARE

                        Input Devices          Processing Device           Output Devices           Storage Devices

                      INPUT DEVICES

                      The hardware devices that are used to give inputs in the form of words, pictures,

                      sounds, etc., to a computer are called input devices. Some of the most commonly
                      used input devices are:

                      Keyboard: A keyboard is an input device used to
                      give input  to  the computer  by  typing  numbers,

                      letters and special characters.
                                                                                                    Keyboard

                                     The invention of Qwerty keyboard

                                   Mouse: A mouse is an input device. We can send instructions to the
                                   computer by clicking on its buttons. It is also used to select objects and

                                   draw pictures on the screen.

                       Mouse

                      Joystick: A joystick is an input device used for playing games.

                                                                                                                Joystick
                                     Webcam: A webcam is an input device used to capture pictures or

                                     videos in digital form.
                       Webcam

                      Light pen: A light pen is an input device used to point or draw on
                      the screen.                                                                           Light Pen

                       26   Computer Science (V5.0)-II

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