I know that most people who have used Google for more than just searching as hit upon the problem of needing help. Google has a large help center, that relies on topic hierarchy or, of course, searching. However, sometimes, you really just want a manual/help file. Well…if you append ?fulldump=1 to the address of a google help center, most of time, you will get…a full dump. An example would be http://mail.google.com/support/?fulldump=1
Note that all of the help pages are frequently updated so your version may become outdated quickly.
Check out the entire list of help page dumps so far at Google OS