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    Memory Unit (MU)                                                                       CPU

                     The CPU also has a memory like human beings. It stores the data and                Memory Unit
                     instructions that you give to the computer along with the results of the
                     processing.                                                                        Control Unit

                          Output Devices

                     The result we get after processing is called Output. The devices which          Arithmetic Logic Unit
                     help us to get these results or outputs are called output devices. Let us
                     study about some of the commonly used output devices.

                     Monitor

                     A monitor looks like a television. It is also known as a Visual Display Unit
                     or VDU. The monitor shows the data that you input and its result (output)
                     after the computer processes it.

                                                 Speakers

                                                 Speakers are used to hear music, voice and sound on a computer.

                     Headphones

                     Headphones are used to listen to music and sound without disturbing others
                     as they are worn by an individual. But wearing them for a long time can
                     affect your hearing power and cause damage to your ears.

                     Printer

                     A printer is used to print the result of the work done by the computer on
                     paper. We can print documents, drawings, images, etc. in black & white as well as in color using
                     a printer. There are two types of printers.

                     Laser Printer

                     It uses a laser beam to print the hard copy.

                                                 Inkjet Printer
                                                 It sprays ink on the paper to print the hard copy.

                                                              Computer System Organization - Hardware, Software & Memory  39

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