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                  Projectors are also used for Smartboards in schools.



                 Storage Devices


                 When  you  have  finished  working  with  your  data,  you  can  save  it  permanently
                 using storage devices. Examples of storage devices are CDs, DVDs, pen drives
                 and hard disks.












                            CD                     DVD                   Pen drive                Hard disk

                    SOFTWARE

                 Computer hardware cannot function on its own. It

                 needs detailed instructions to perform tasks. These
                 detailed instructions are  called  software. For
                 example, the games you play on a computer are

                 examples of software.
                 Let’s take another example:

                 When you purchase a movie DVD, you can touch and hold the
                 DVD itself. However, you cannot touch the movie stored on it. The
                 DVD is the hardware, while the movie it contains is the software.

                 Types of Software                                                                         DVD


                 There are mainly two types of software:                               Software
                 1.  System software

                 2.  Application software
                                                                        System                         Application
                                                                        Software                         Software




                                                                                           A Computer System     11
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