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CC0 - Public domain
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CC BY - Creative Commons Attribution
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. (Read more about this license)
CC BY-SA - Creative Commons Attribution-Share Alike
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.
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