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There are licenses accepted by the OSI which are not free as per the Free Software Definition. The Open Source Definition allows for further restrictions like price, type of contribution and origin of the contribution, e.g. the case of the NASA Open Source Agreement, which requires the code to be "original" work.
A permissive software license, sometimes also called BSD-like or BSD-style license, [1] is a free-software license which instead of copyleft protections, carries only minimal restrictions on how the software can be used, modified, and redistributed, usually including a warranty disclaimer.
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The BSD license family is one of the oldest and most broadly used license families in the free and open-source software ecosystem, and has been the inspiration for a number of other licenses. Many FOSS software projects use a BSD license, for instance the BSD OS family (FreeBSD etc.), Google 's Bionic or Toybox.
While the goals behind the terms are different, open-source licenses and free software licenses describe the same type of licenses. [13] The two main categories of free and open-source licenses are permissive and copyleft. [14] Both grant permission to change and distribute software. Typically, they require attribution and disclaim liability.
Initially titled Microsoft Permissive License, it was renamed to Microsoft Public License while being reviewed for approval by the Open Source Initiative (OSI). [10] The license was approved on October 12, 2007, along with the Ms-RL. [11] According to the Free Software Foundation, it is a free software license but not compatible with the GNU ...
The Apache License version 2.0 [3] is a similarly permissive license that includes an explicit contributor's patent license. Of specific relevance to US jurisdictions, the MIT license uses the terms "sell" and "use" that are also used in defining the rights of a patent holder in Title 35 of the United States Code section 154.
The Free Software Foundation prefers copyleft (share-alike) free-software licensing rather than permissive free-software licensing for most purposes. Its list distinguishes between free-software licenses that are compatible or incompatible with the FSF's copyleft GNU General Public License .