Page 406 - Computer Science Class 11 With Functions
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Working licence: When a user buys or installs software, they usually agree to an end-user licence agreement (EULA),
        which outlines the legal relationship between the licensor and the licensee. The EULA is a contract that allows users
        to install and use the software. When installing some software, the user is often asked to click a button to agree to the
        terms and conditions. For cloud-based applications, the EULA may include information such as:
        ●  Charges per user on a monthly or annual basis.
        ●  The duration of the agreement.
        ●  Terms of agreement termination.

        Software licences may be classified as:
        1.  Proprietary Licence: The users of software under proprietary licence will be able to use the software, but they do
           not have access to the source code and are not authorised to modify it. Proprietary licence is also known as closed
           source licence because the source code is not open to the users.  Some proprietary software may be free to use, but
           you cannot access the source code. For example, basic versions of the proprietary software Adobe and Grammarly
           are free to use.  Examples of the priced proprietary software include Windows, Mac, and Microsoft Office.

        2.  Free and Open Source Licence: As the name implies, free and open source licenced software is the software
           with publicly available source code. Open source licence allows the user to modify the software and distribute
           the modified version. Open source software is typically developed in a collaborative manner by a community of
           developers. The users can submit their views on the enhancement and improvement of the software.

        15.8.1 Creative Commons

        Creative Commons licences give content creators a standard way to let other people use their work. It is a standard
        form of a licence agreement that lets someone use a work without having to talk to the creator or negotiate terms. For
        example, filmmakers can use a Creative Commons CC BY licence for their videos on YouTube. Thus, they retain their
        copyright on the content that can be freely used by their users.




                                             CC

                                                                     BY



        15.8.2 General Public License (GPL)

        Under  the  General  Public  License  (GPL),  users  can  use,  modify,  and  share  the
        software. The following is the list of GPL features, where users are:

        ●  Permitted to download and use the software.
        ●  Permitted to modify the software.
        ●  Permitted to redistribute the software.

        15.8.3 Apache

        Apache  is  an  open-source  software  project,  an  initiative  by  the  Apache
        Software Foundation (ASF). As a permissive free and open-source licence,
        an Apache licence permits a user to share, modify, and share again. When
        you re-distribute software with an Apache licence, you must include a copy
        of the licence and a notice that the file has been changed for every file that
        has been changed.




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