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    1.   Which device is known as the brain of a computer?
                              uiz   Bee            ______________________________________________

                                               2.   What is the use of a keyboard?
                                                   ______________________________________________

                      OUTPUT DEVICES

                      The devices that display the  results  of processing  done by the  CPU  are  called
                      output devices. Output can be a printout from the printer, sound from the

                      speakers, image on the monitor or content on the projector. The most commonly
                      used output devices are printer, monitor, speakers, projector, plotter, etc.

                      Printer: A printer is an output device used to print text or pictures. There are three

                      types of printers: Dot matrix printer, Inkjet printer and Laser printer.

                             Dot Matrix                             Inkjet                                Laser
                      Monitor: A monitor is an output device used to display information processed by

                      the  computer.  Whatever you  type  on the  keyboard  is  seen  on the  monitor.
                      The monitor is also known as Visual Display Unit or VDU. There are different types
                      of monitors:

                                      CRT                             LCD                         Touchscreen

                                    Speakers: Speakers are the output devices used to play music, voice
                                    and sounds stored in a computer. It gives an output in the form of a
                                    sound.
                       Speakers
                      Projector:  A  projector is  an output  device  used  to  display

                      videos, pictures, documents, etc., from a computer screen to
                      a large screen.                                                                     Projector

                       28   Computer Science (V5.0)-II

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