ICDL License terms; Attribution-ShareAlike
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Attribution-ShareAlike 2.5 You are free: To copy, distribute, display, and perform the work, To make derivative works, To make commercial use of the work Under the following conditions: by Attribution. You must attribute the work in the manner specified by the author or licensor who is: David Varley ICDL Foundation Copyright © 2004 ICDL Foundation.
Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one. For any reuse or distribution, you must make clear to others the license terms of this work. Any of these conditions can be waived if you get permission from the copyright holder.