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Speakers

            Speakers produce music, speech or other sounds as output.



                                      Headphones

                                      Headphones are  small speakers used to hear  the sound
                                      without causing disturbance to others.





            Projector

            A projector displays the output from the computer screen
            onto a larger screen.






              Projectors are also used with Smartboards in schools.


            Storage Devices


            Storage devices are the hardware devices used to store data. Once you have finished
            working with your data, you can store the data permanently in storage devices.
            Some examples of storage devices are Hard disk, DVD and Pen drive.










                            Hard disk                         DVD                       Pen drive


                SOFTWARE

            Computer hardware cannot work by itself. It needs step-by-step instructions to
            perform a task. These step-wise instructions are called software. The games you play
            on a computer are examples of software. There are mainly two types of software:

            system software and application software.
            System Software

            System software controls and manages the overall activities of a computer system.

            So, the system software is like a manager of a computer system. Without system
            software, the computer is like a car without wheels.





                                                                                    A Computer System         9
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