Keyword documentation

[tsuraan]

Is there a list somewhere of what erlang's keywords/reserved words
are, and what they do?  I just found the other day that query is a
reserved word, which appears to be something archaic.  cond is another
reserved word, whose purpose I can't find, but it seems promising.
I'm sure there's a doc somewhere with erlang's keywords and their
meanings, but I'm not having any luck finding it.