Page 479 - Computer Science V2.0 Class 11
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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.
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                 ●  erms 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:
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                 ●  ermitted to download and use the software.
                 ●  ermitted to modify the software.
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                 ●  ermitted to redistribute the software.
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                 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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