Page 12 - KEC Khaitan C3 Flipbook
P. 12

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




                  Microphone: A microphone is an input device used to record voice,
                  music and other sounds on a computer.                                                  Microphone


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


                  Scanner: A scanner is an input device that reads text or images

                  and sends their copies to the computer.
                                                                                                       Scanner
                  PROCESSING DEVICE


                  The device which is used to process the input data is called a processing device. In
                  a computer  system,  the  Central  Processing  Unit (CPU) works as a processing
                  device. It controls the entire working of the computer system.

                  The parts of the CPU are:

                     Arithmetic Logic Unit (ALU): It performs all the arithmetic

                      operations such as addition, subtraction, multiplication,
                      division  and  all the  logical  operations  such  as  greater

                      than, less than, equal to, etc.                                           CPU Box         CPU
                     Control Unit (CU): It controls the working of all the parts of a computer. It

                      acts like a supervisor and is used to control the flow of information from the
                      CPU to other parts of the computer and vice-versa.



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