Unfortunately, in the beginning the Wiki/FAQ
did not have a license. People were collaborating on it in the hopes it might be helpful to others, without worrying about legalese involved.
There has been
an attempt to get all contributions retroactively
CC0 licensed (thanks for the hard work put into it, Combuster!), but that process was never actually finished:
OSDev_Wiki:License wrote:
As from 03-07-2011, all new content has to be strictly compatible with
Public Domain licensing. All authors of existing material will be attempted to be informed of the new official license declaration. Any author not in agreement of the new license(s) can have their content removed or choose to dual license their work. This does not apply to forum content in which all posts are owned by the author.
That means that currently
the contents of this wiki is of mixed licensing.