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                     The speed of a CPU is measured in Megahertz. Higher the value, faster is the information
                     processed by the CPU.


                      OUTPUT DEVICES


                  The output devices are used to display the information and result of computation
                  to the user. Some of the output devices are:
                  Monitor

                  The monitor is one of the most familiar output devices. It is

                  called the Visual Display Unit (VDU). The images that you see
                  on the monitor are made up of tiny dots called pixels. The
                  clarity of the images depends on the number of dots/pixels on
                  the screen per inch.                                                                 Monitor
                  Printer


                  A printer is an output device that allows to print the work done on the computer
                  on a sheet of paper. The most commonly used printers are Dot Matrix Printers,
                  Inkjet Printers, Laser Printers and Plotters.
                      Dot matrix printer works like a typewriter. The printer head strikes the paper and
                     ink ribbon to print a character.

                      The Inkjet printer prints  line-by-line by spraying ink on a sheet of paper.
                      The Laser printer uses a laser beam to print on the paper.











                         Dot matrix printer
                                                                 Inkjet printer                    Laser printer

                      Plotters are just like printers but are much bigger in size. There are mainly two
                     types of plotters: Drum Plotter and Flatbed Plotter.














                                            Flatbed Plotter                   Drum Plotter

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