Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

This work includes material that may be protected as a trademark in some jurisdictions. If you want to use it, you have to ensure that you have the legal right to do so and that you do not infringe any trademark rights. See our general disclaimer. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

The Tux logo (tux.svg) is copyright (C) 2009 Larry Ewing, Simon Budig und Anja Gerwinsk. The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.

The Debian logo (debian.svg) is copyright (C) 1999 Software in the Public Interest. This logo or a modified version may be used by anyone to refer to the Debian project, but does not indicate endorsement by the project.

The Slackware logo (slackware.svg) is a combination of an icon and a text piece. The text piece is not eligible for copyright. The icon part is based on the following image by bobmoser, which is released under the GPL: http://kde-look.org/content/show.php/?content=53206

The Red Hat Shadowman logo is courtesy from and copyright (C) 2010 by Red Hat, Inc.
Usage permission is granted:
_______________________________________________________________________
Dear Mr. Rodic,

You have Red Hat, Inc.'s permission to use our Shadowman logo and trademark in the attached form solely for the use shown in the document you have hyperlinked at http://futurist.se/gldt/gldt1004.png, that is, on a GNU/Linux pictorial timeline where the image is used adjacent to a point on the timeline that represents the beginning of the Red Hat Linux distribution. The logo must be approximately the same size as the Debian and Slackware logos you are also using.

I very much appreciate that you asked for permission. Please use the logo attached rather than the one that you currently have, since the one you are currently using is not quite correct (he has a stumpy neck). If Wikipedia requires further information or verification that Red Hat has granted you permission for this use, I will be happy to assist you.

Best regards,

Pamela S. Chestek
Senior IP Attorney
Red Hat, Inc.
_______________________________________________________________________
Dear Mr. Rodic:

I apologize for the delay, my request for a logo got lost in our work queue. You will find an svg version attached. The display size of the logo you are using in the file attached is acceptable.

Please, though, do not make the svg version of the logo publicly available other than as part of the overall cladogram.

Best regards,

Pamela S. Chestek
Senior IP Attorney
Red Hat, Inc.