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Joystick


                 Joystick is  a pointing device which is used to control  the
                 movement of a pointer on your computer screen. It is mostly
                 used device to play games on the computer.





                                                                                                        Joystick
                                      Microphone

                                      It 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.


                     PROCESSING DEVICE                                                            Touchscreen

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

                 CPU

                 CPU (Central Processing Unit) is a processor, sometimes called a microprocessor. It
                 is the brain of the computer that does all the calculations, and runs all the programs.
                 It manages all the operations and carries out the basic instructions which operate a
                 computer. The three main components of CPU are:


                                                                        Memory Unit



                                                                        Control Unit




                                                                            ALU
                                                           CPU
                                              CPU box               Functioning of CPU

                    ALU (Arithmetic Logic Unit):  Performs mathematical and logical operations.
                    CU (Control Unit): Directs all the operations of a processor.

                    Memory Unit: Stores data and instructions.


                                                                                  Fundamentals of a Computer         11
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