Probably this is old news, only I didn't know. For a list of all available commands in the terminal (tcsh), type Control-x Control-d.
[Editor's note: This is one of the default key bindings in the shell. You can see a list of all defined key bindings by typing bindkey at the prompt.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020327093704774