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HandWiki. Original BSD License. Encyclopedia. Available online: https://encyclopedia.pub/entry/28859 (accessed on 20 September 2026).
HandWiki. Original BSD License. Encyclopedia. Available at: https://encyclopedia.pub/entry/28859. Accessed September 20, 2026.
HandWiki. "Original BSD License" Encyclopedia, https://encyclopedia.pub/entry/28859 (accessed September 20, 2026).
HandWiki. (2022, October 11). Original BSD License. In Encyclopedia. https://encyclopedia.pub/entry/28859
HandWiki. "Original BSD License." Encyclopedia. Web. 11 October, 2022.
Original BSD License
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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. The original BSD license was used for its namesake, the Berkeley Software Distribution (BSD), a Unix-like operating system. The original version has since been revised, and its descendants are referred to as modified BSD licenses. BSD is both a license and a class of license (generally referred to as BSD-like). The modified BSD license (in wide use today) is very similar to the license originally used for the BSD version of Unix. The BSD license is a simple license that merely requires that all code retain the BSD license notice if redistributed in source code format, or reproduce the notice if redistributed in binary format. The BSD license (unlike some other licenses e.g. GPL) does not require that source code be distributed at all.

copyleft gpl free software

References

  1. Bostic, Keith (15 June 1988). "4.3BSD-tahoe release". Newsgroup: comp.sys.tahoe. Retrieved 5 December 2021. https://groups.google.com/g/comp.sys.tahoe/c/50ManvdM1-s
  2. "To All Licensees, Distributors of Any Version of BSD". University of California, Berkeley. 1999-07-22. ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change. 
  3. Richard Stallman. "The BSD License Problem". Free Software Foundation. https://www.gnu.org/philosophy/bsd.html. 
  4. "Original BSD license". Various Licenses and Comments about Them. Free Software Foundation. https://www.gnu.org/licenses/license-list.html#OriginalBSD. 
  5. "Berkeley removes Advertising Clause – Slashdot" (in en). https://bsd.slashdot.org/story/99/09/02/189210/berkeley-removes-advertising-clause. 
  6. Comparing the BSD and GPL Licenses on Technology Innovation Management Review by Bruce Montague (on October 2007) http://timreview.ca/article/67
  7. "The BSD License:Licensing". Open Source Initiative. http://www.opensource.org/licenses/bsd-license.php. 
  8. "Modified BSD license". Various Licenses and Comments about Them. Free Software Foundation. https://www.gnu.org/licenses/license-list.html#ModifiedBSD. 
  9. "The FreeBSD Copyright". The FreeBSD Project. http://www.freebsd.org/copyright/freebsd-license.html. 
  10. "The FreeBSD Copyright (as available at archive.org)". The FreeBSD Foundation. http://www.freebsd.org/copyright/freebsd-license.html. 
  11. "The FreeBSD Copyright". https://www.freebsd.org/copyright/freebsd-license.html. 
  12. "FreeBSD license". Various Licenses and Comments about Them. Free Software Foundation. https://www.gnu.org/licenses/license-list.html#FreeBSD. 
  13. "NetBSD Licensing and Redistribution". The NetBSD Foundation. http://www.netbsd.org/about/redistribution.html. 
  14. "OpenBSD Copyright Policy". https://www.openbsd.org/policy.html. 
  15. "BSD 0-Clause License (0BSD) Explained in Plain English". https://tldrlegal.com/license/bsd-0-clause-license. 
  16. "BSD Zero Clause License". https://spdx.org/licenses/0BSD.html. 
  17. "Zero-Clause BSD / Free Public License 1.0.0 (0BSD)". https://opensource.org/licenses/0BSD. 
  18. "SPDX License List". SPDX Working Group. https://spdx.org/licenses/. 
  19. "BSD 1-Clause License". Software Package Data Exchange (SPDX). 2018. https://spdx.org/licenses/BSD-1-Clause.html. 
  20. "Log of /head/include/ifaddrs.h". svnweb.freebsd.org. https://svnweb.freebsd.org/base/head/include/ifaddrs.h?revision=62606&view=markup. 
  21. Montague, Bruce (2013-11-13). "Why you should use a BSD style license for your Open Source Project – GPL Advantages and Disadvantages". FreeBSD. http://www.freebsd.org/doc/en_US.ISO8859-1/articles/bsdl-gpl/article.html. "In contrast to the GPL, which is designed to prevent the proprietary commercialization of Open Source code, the BSD license places minimal restrictions on future behavior. This allows BSD code to remain Open Source or become integrated into commercial solutions, as a project's or company's needs change. In other words, the BSD license does not become a legal time-bomb at any point in the development process. In addition, since the BSD license does not come with the legal complexity of the GPL or LGPL licenses, it allows developers and companies to spend their time creating and promoting good code rather than worrying if that code violates licensing." 
  22. Hanwell, Marcus D. (28 January 2014). "Should I use a permissive license? Copyleft? Or something in the middle?". opensource.com. http://opensource.com/business/14/1/what-license-should-i-use-open-source-project. "Permissive licensing simplifies things One reason the business world, and more and more developers [...], favor permissive licenses is in the simplicity of reuse. The license usually only pertains to the source code that is licensed and makes no attempt to infer any conditions upon any other component, and because of this there is no need to define what constitutes a derived work. I have also never seen a license compatibility chart for permissive licenses; it seems that they are all compatible." 
  23. "Licence Compatibility and Interoperability". Open-Source Software – Develop, share, and reuse open source software for public administrations. joinup.ec.europa.eu. https://joinup.ec.europa.eu/software/page/licence_compatibility_and_interoperability. "The licences for distributing free or open source software (FOSS) are divided in two families: permissive and copyleft. Permissive licences (BSD, MIT, X11, Apache, Zope) are generally compatible and interoperable with most other licences, tolerating to merge, combine or improve the covered code and to re-distribute it under many licences (including non-free or "proprietary")." 
  24. Torvalds at LinuxCon Part III: Permissive Licenses and Org Charts FOSS Force, 2016 https://fossforce.com/2016/09/torvalds-linuxcon-permissive-licenses-org-charts/
  25. "Top 20 licenses". Black Duck Software. 19 November 2015. http://www.blackducksoftware.com/resources/data/top-20-licenses. "1. MIT license 24%, 2. GNU General Public License (GPL) 2.0 23%, 3. Apache License 16%, 4. GNU General Public License (GPL) 3.0 9%, 5. BSD License 2.0 (3-clause, New or Revised) License 6%, 6. GNU Lesser General Public License (LGPL) 2.1 5%, 7. Artistic License (Perl) 4%, 8. GNU Lesser General Public License (LGPL) 3.0 2%, 9. Microsoft Public License 2%, 10. Eclipse Public License (EPL) 2%" 
  26. Balter, Ben (2015-03-09). "Open source license usage on GitHub.com". github.com. https://github.com/blog/1964-license-usage-on-github-com. ""1 MIT 44.69%, 2 Other 15.68%, 3 GPLv2 12.96%, 4 Apache 11.19%, 5 GPLv3 8.88%, 6 BSD 3-clause 4.53%, 7 Unlicense 1.87%, 8 BSD 2-clause 1.70%, 9 LGPLv3 1.30%, 10 AGPLv3 1.05%" 
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