Acronym of GFDL
( GNU Free Document License ) The GNU Free Documentation license (GFDL) is an authorization letter, copy FOR FREE content is that the Free Software Foundation (FSF) it for project GNU has designed. This authorization letter is in fact equivalent to GNU a photoluminescent is the same as the rights to reproduce, playback, and change the effect to users. All versions are reproduced, and their derivatives must be under the same licenses available. The possibility of commercial use of the versions which are there, but if in a high number of duplicate (more than 100), then the document or the source code, the original must be made available to the recipient of the effect used.
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