Z:gnu-www-ja-assigning-copyright--f98fb4-Companies that develop free so/en

Companies that develop free software and release it under the GNU GPL sometimes distribute some copies of the code in other ways. If they distribute the exact same code under a different license to certain users that pay for this, typically permitting including the code in proprietary programs, we call it &ldquo;selling exceptions&rdquo;. If they distribute some version of the code solely in a proprietary manner, we call that releasing a purely proprietary version of the program.