Open Source: can be free of copyright and is usually available to anyone, It costs nothing and provides the source code so that anyone can modify the software for their own purposes., It can have many authors. This enables programmers to contribute to the development of a program over time, refining and improving it and adding extra features., A modified version, known as a derivative, must also be made freely available for anyone else to use or adapt., There is no guarantee that it works properly as there is no requirement for anyone to ensure it is bug free., Support might not be readily available, especially if the program is not in widespread use., Linux operating system, Firefox web browser, Python programming language, Proprietary : is copyrighted and only available under licence, you have to pay for the license to obtain it, The product should be free of bugs. If bugs still exist, updates known as patches are often provided free of charge, which fix these bugs., Help can be sought from the organisation who supplied the software if problems occur., Feature updates which extend the software's facilities are often available, although usually at a cost., Proprietary software that is in widespread use often has support available from many sources., There is an initial or ongoing (subscription) cost., Software cannot be adapted to meet the needs of the user. Only the machine code version of the software is distributed, which cannot be edited., It can be limited to a single computer or network, so unless the licence allows it, a user may not redistribute the software., Windows and OS X operating systems, Adobe Creative Suite productivity software, paid-for games for consoles,

Open Source vs Proprietary Software

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