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Chapter Profile
                                                                                         Chapter Profile

                 Joystick

                 A  joystick  is a pointing device used to control the movement of a






                 pointer on your computer screen. It is mostly used to play games on the
                 computer.

                                                                                                         Joystick
                                   Microphone

                                   A microphone is an input device that is used to record voice, music and

                                   sound into the computer system.

                   Microphone



                 Touchscreen

                 A touchscreen is a screen sensitive to touch. We can interact with
                 a computer by touching areas on the screen. Tablets, smartphones,
                 ATMs have touchscreen in them.


                                                                                                     Touchscreen
                        PROCESSING DEVICE


                 Processing is done on the data entered into the computer, to convert it into meaningful
                 information through a processor.

                 CPU


                 CPU (Central Processing Unit) is a processor,                                        Memory Unit
                 sometimes called a  microprocessor. It is
                 the brain of the computer that does all the
                 calculations, and  runs all the  programs.                                           Control Unit
                 It  manages  all  the  operations and  carries

                 out the basic instructions which operate a                                               ALU
                 computer. The  three  main  components  of
                 CPU are:                                               CPU box          CPU       Functioning of CPU

                    ALU (Arithmetic Logic Unit):  Performs mathematical and logical operations.

                    CU (Control Unit): Directs all the operations of a processor.
                    MU (Memory Unit):  Stores data and instructions.







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