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There are a number of different definitions of free content in regular use. Legally, however, free content is very similar to open content.An analogy is a use of the rival terms free software and open-source, which describe ideological differences rather than legal ones.
Open-source licenses allow other businesses to commercialize covered software. [109] Work released under a permissive license can be incorporated into proprietary software. [110]
More than 90 percent of companies use open-source software as a component of their proprietary software. [70] The decision to use open-source software, or even engage with open-source projects to improve existing open-source software, is typically a pragmatic business decision.
BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and distribution of covered software.This is in contrast to copyleft licenses, which have share-alike requirements.
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In 2000, the "Do What the Fuck You Want To Public License" was released as a public-domain-equivalent license for software. [2]It is distinguished among software licenses by its informal style and lack of a warranty disclaimer.
The GNU General Public Licenses (GNU GPL, or simply GPL) are a series of widely used free software licenses, or copyleft licenses, that guarantee end users the freedoms to run, study, share, or modify the software. [7]
In the mid-1980s, the GNU project produced copyleft free-software licenses for each of its software packages. An early such license (the "GNU Emacs Copying Permission Notice") was used for GNU Emacs in 1985, [5] which was revised into the "GNU Emacs General Public License" in late 1985, and clarified in March 1987 and February 1988.