/global/copyright.adp explains the site's copyright policy
/global/server-busy is served by AOLserver when the threads are stacked
up (presumably because the RDBMS is overwhelmed)
/global/file-not-found is served by AOLserver when the user hits a non-existent
URL; presumably this will contain some search tips
/global/unauthorized is served by AOLserver when the user hasn't typed in
a valid HTTP username/password (this shouldn't really ever be part of the
user experience since the ArsDigita Community System doesn't use HTTP usernames/passwords)
/global/forbidden is served by AOLserver when the nsperm system isn't happy
and refuses to say why (not sure why this should ever happen)
/global/error is served by AOLserver when it chokes on a Tcl API program
or CGI script
/global/privacy.adp is the site's privacy statement.