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Chapter Profile
                 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.


                                Clickipedia



                     Projectors are also used for 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,              Hard disk           DVD          Pen drive
                 DVD and pen drive.




                                   If CPU is the brain of a computer, then which computer hardware is its ear?





                        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 a driver.



                                                                                                 A Computer System   9
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