Page 10 - TP_Pluse_V2.2_Class3
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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




                                             Input       Processing     Output       Storage
                                            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 on the
                                          computer monitor. 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.


                                          Joystick
                                          A joystick is used to play games on a computer. It helps to control

                                          the different movements in the game.


                  Touchscreen

                  A touchscreen is used to enter data by simply touching the screen.
                  While using a touchscreen, a finger acts as a pointing device and
                  the object on the screen is selected using a finger. The result is also

                  shown on the screen. So, it is both an input device and an output
                  device.

                   8    Plus (Ver. 2.2)-III
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