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    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. In this,
                      finger acts as a pointing device and the object on the screen is pointed

                      using a finger.

                                                  Microphone
                                                  A microphone is an input device. It is used to record voice, music and
                                                  sounds that can be stored on a computer.

                      Web Camera

                      A web camera is used to take pictures in digital form and store photographs in
                      the computer. It is also known as webcam.

                                                   Light Pen
                                                  A light pen is used to point to objects or draw on the screen in a way

                                                  like a touch screen.

                           Processing Device

                      The CPU (Central Processing Unit) is the processing device that works on input and sends the result
                      to the output devices.  The CPU is a chip which is placed inside the CPU box.

                      CPU is also called the “brain” of a computer as it is responsible for all the work done. A CPU
                      is further divided into three parts: ALU, CU and MU.

                      Arithmetic Logic Unit (ALU)

                      ALU does all the arithmetic calculations like addition,
                      subtraction, multiplication, division, etc. It also does
                      comparisons like greater than, less than, equal to, etc.

                      Control Unit (CU)                                                        CPU              CPU Box

                      CU coordinates and controls all the parts of the CPU. The CU gets the data and instructions from
                      the memory unit and passes them to the ALU in a step-by-step manner.

                      38    Premium Edition-VII

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