About Creative Commons Licenses
Open licenses like Creative Commons (CC) give downstream users of a work permission to use a work in certain ways, like sharing, editing, and remixing with other works to create new ones. An open license does not mean the original authors forfeited all copyright protection. They have only given specific permissions under specific conditions, like requiring attribution. For more background information about copyright laws, see the library's Copyright Resources guide.
Defined on this page are the variations of CC licenses you'll see commonly applied to OERs. These licenses consist of four building blocks: BY (attribution required), NC (non-commercial), SA (share-alike), and ND (no derivatives).
Attribution (CC BY)
This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.
Attribution-ShareAlike (CC BY-SA)
This license lets others remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms. This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use. This is the license used by Wikipedia, and is recommended for materials that would benefit from incorporating content from Wikipedia and similarly licensed projects.
Attribution-NoDerivs (CC BY-ND)
This license allows for redistribution, commercial and non-commercial, as long as it is passed along unchanged and in whole, with credit to you.
Attribution-NonCommercial (CC BY-NC)
This license lets others remix, tweak, and build upon your work non-commercially, and although their new works must also acknowledge you and be non-commercial, they don’t have to license their derivative works on the same terms.
Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)
This license lets others remix, tweak, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms.
Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)
This license is the most restrictive of our six main licenses, only allowing others to download your works and share them with others as long as they credit you, but they can’t change them in any way or use them commercially.
Public Domain Dedication, “No Rights Reserved” (CC0)
CC0 enables scientists, educators, artists and other creators and owners of copyright- or database-protected content to waive those interests in their works and thereby place them as completely as possible in the public domain, so that others may freely build upon, enhance and reuse the works for any purposes without restriction under copyright or database law.
This page is adapted from "About the Licenses," licensed under CC-BY. Icons by The Noun Project.
