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Copyright Copyleft

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2021-05-25 13:45:10

Copyright Copyleft

        The most familiar license agreement used in library works is Copyright, which means that works may not be reproduced before the license holder allowed. 

        However, there is another license called Copyleft, that allows the work to be reproduced, modified or used for commercial purposes. But can not register the copyright of this modified piece and must be maintain the originality of the left only.         Copyleft is most commonly used in software applications such as open-source programs.