copyleft

Also known as 🄯, copyleft licensing

265px|thumb|alt=Capital letter C flipped around its vertical axis, surrounded by a single line forming a circle.|Copyleft symbol

AI overview

Copyleft is a licensing approach that uses copyright law to ensure software (or other creative works) remains free and open for others to use, modify, and share. It matters because it creates a legal framework that prevents people from taking these freely available works and turning them into proprietary products, keeping them accessible to everyone.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Symbol.mark: ©
Symbol.name: Copyleft symbol
Symbol.unicode: &#127279;

via Wikipedia infobox

Described at

Ihre Datenschutzeinstellungen

yahoo.com →

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Wikidata facts

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described at URL: [email protected]
Commons category: Copyleft
Unicode character: 🄯
P13411: Jim Clark

Sources (4)

via Wikidata · CC0

~24 min read

Article

17 sections

Contents

History
Copyleft principles
Freedom
Reciprocity
Economic incentive
Copyleft application
Types and relation to other licenses
Strong and weak copyleft
Full and partial copyleft
Share-alike
Permissive licenses
Debate and controversy
"Viral" licensing
Symbol
See also
References
External links

265px|thumb|alt=Capital letter C flipped around its vertical axis, surrounded by a single line forming a circle.|Copyleft symbol

Copyleft is the legal technique of granting certain freedoms over copies of copyrighted works with the requirement that the same rights be preserved in derivative works. In this sense, freedoms refers to the use of the work for any purpose, and the ability to modify, copy, share, and redistribute the work, with or without a fee. Licenses which implement copyleft can be used to maintain copyright conditions for works ranging from computer software, to documents, art, and scientific discoveries. Similar approaches have been applied to certain patents.