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    Virus Scanner

                     It is used to scan the computer for viruses among files and folders. It scans the disk each time you
                     insert it into a computer or whenever the computer is booted. It is also called antivirus software.
                     Quick Heal, Norton, etc. are examples of antivirus software.

                          Application Software

                     It is  a program  designed  to  help users perform  specific  tasks. These tasks  can be  personal,
                     educational, business-related, etc. Generally, people refer to application software as software.
                     Application software can be broadly classified into two categories:

                                                              Application Software

                                   General Purpose Software                                       Customised Software

                            Word            Presentation           Desktop Publishing             Multimedia
                         Processors           Software              (DTP) Software                Processors

                                 Spreadsheets     Database Management             Image Processing
                                                     Systems (DBMS)                   Software

                     General Purpose Software

                     General purpose  software are those  which have not been  developed  according  to  the needs
                     of a particular organisation or a particular industry. It can be used for both commercial and
                     non-commercial purposes. The general purpose software can further be classified into seven
                     different groups on the basis of their use. These are:

                     Word Processors
                     Word Processors are used to create, edit, format and print text documents. They are commonly
                     used  in businesses,  schools and at  home.  Microsoft  Word  is  the  most  commonly  used  word

                     processor. Some other word processors are WordPerfect, Writer and Kword.

                                                              Computer System Organization - Hardware, Software & Memory  43

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