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Application Software
                 Application software is a set of programs that helps the programmers to perform a specific task. It can be installed
                 on a computer or mobile device, depending on the needs of the user. For example: Word deals with documents,
                 Spreadsheets with calculation, Presentation software for creating and running presentations.

                 Utility Software

                 Utility software does housekeeping functions like backing up disk or scanning/cleaning viruses or arranging information
                 etc. They ensure the smooth functioning of the computer.

                 If you switch on the computer, then you are using the physical parts of the computer called hardware. The set of
                 changes you see on your screen before it displays your login screen that your operating system is getting activated
                 and ready to be with you till you are using a computer. When you work on a LibreOffice document, spreadsheet,
                 presentation, etc. then you are using application software installed in your computer. When the system does their
                 backup of your data or checks for malware then you are using utility software.


                         OPERATING SYSTEM

                 Operating System (OS) is a system software which is compulsory for the computer. Without an operating system, a
                 computer is just a machine with no usage. It works as a manager of the computer and helps you to utilise computer
                 hardware in an efficient manner.

                                                             Computer Games

                                                                                Internet
                                                              Utilities         Browsers


                                                                      Operating     Application
                                                     Hardware
                                                                       System        Software
                                                                System
                                                               Software
                                                                         Databases


                 Some of the important functions performed by an operating system are:
                 •  It works as an interface between the user and the machine.                                User

                 •  It works as a device manager. It keeps a track that all the devices are functioning properly
                   and are available to the user whenever needed.
                 •  It manages the software of the computer.                                               Application

                 •  It manages the computer memory and keeps track of the memory in use and free so that it
                   is available to the user whenever needed.                                             Operating System
                 •  It decides which process gets the processor time for execution, when and for how much
                   time.                                                                                    Hardware
                 •  It helps in creating and managing the hierarchical structure of the files and folders. It assists
                   the smooth process of create, copy, move and delete the files.
                 •  By providing a login and password facility it prevents unauthorized access to programs and data.

                 As we now know that it is not possible for the user to use any computer or mobile device without having an operating
                 system. So whenever you buy a new desktop or a laptop then the operating system comes installed in it. You just have
                 to activate it with some few initial steps and then it becomes available for you forever.


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