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Unless otherwise noted, I hold copyright in all materials created by me, and allow general use under the copyleft terms of the GNU General Public License for software and for the rest a Creative Commons License that requires attribution. Any changes or additions that you make to this set of pages as a Web document must be shared alike, and may be folded into later versions by me. Any such inclusions will of course be credited with your copyright, under the same License.
You may use my copyright materials, for profit or for free, as long as you acknowledge my authorship and copyright. You may create variant and derivative works as long as you are accurate in attributing my contribution. You may redistribute my work, variants, and derivatives as long as you pass on the full license that I grant to you with every copy.
This copyright notice is a collage of sentences from many authors. You are free to use the content of this notice in any way you like, even without attributing it to me.