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Proprietary software is software that grants its creator, publisher, or other rightsholder or rightsholder partner a legal monopoly by modern copyright and intellectual property law to exclude the recipient from freely sharing the software or modifying it, and—in some cases, as is the case with some patent-encumbered and EULA-bound software ...
While such software often later becomes open source software or public domain, other constructs and software licenses exist, for instance shared source or creative commons licenses. [1] [2] If the source code is given out without specified license or public domain waiver it has legally to be considered as still proprietary due to the Berne ...
Open core is a business model where developers release a core piece of software as open source and monetize a product containing it as proprietary software. [114] The strong copyleft GPL is written to prevent distribution within proprietary software.
A software philosophy that combines aspects of FOSS and proprietary software is open core software, or commercial open source software. Despite having received criticism from some proponents of FOSS, [7] it has exhibited marginal success. Examples of open core software include MySQL and VirtualBox.
License compatibility is a legal framework that allows for pieces of software with different software licenses to be distributed together. The need for such a framework arises because the different licenses can contain contradictory requirements, rendering it impossible to legally combine source code from separately-licensed software in order to create and publish a new program.
Any software is source-available in the broad sense as long as its source code is distributed along with it, even if the user has no legal rights to use, share, modify or even compile it. It is possible for a software to be both source-available software and proprietary software (e.g. id Software's Doom).
This shields the program, and its modified versions, from some of the common ways of making a program proprietary. Some copyleft licenses block other means of turning software proprietary. Copyleft is a general concept. Copylefting an actual program requires a specific set of distribution terms.
Proprietary language learning software (10 P) O. Proprietary operating systems (19 C, 126 P) P. Proprietary package management systems (6 P) V. Proprietary version ...