Our server has the following environmental variables

DOCUMENT_ROOT=/var/www/zytrax HTTP_ACCEPT=Accept: application/xhtml+xml,text/html;q=0.9,text/plain; HTTP_ACCEPT_CHARSET=ISO-8859-1,utf-8;q=0.7,*;q=0.7 HTTP_ACCEPT_ENCODING=gzip HTTP_ACCEPT_LANGUAGE=en-us,en;q=0.5 HTTP_CACHE_CONTROL=no-cache HTTP_CONNECTION=close HTTP_HOST=www.zytrax.com HTTP_PRAGMA=no-cache HTTP_USER_AGENT=CCBot/1.0 (+http://www.commoncrawl.org/bot.html) PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/sbin REMOTE_ADDR=38.103.63.60 REMOTE_PORT=43545 SCRIPT_FILENAME=/var/www/zytrax/tech/web/show_env.shtml SERVER_ADDR=210.23.9.16 SERVER_ADMIN=web-master@zytrax.com SERVER_NAME=www.zytrax.com SERVER_PORT=80 SERVER_SIGNATURE=<ADDRESS>Apache/1.3.34 Server at <A HREF="mailto:web-master@zytrax.com">www.zytrax.com</A> Port 80</ADDRESS> SERVER_SOFTWARE=Apache/1.3.34 (Unix) mod_ssl/2.8.25 OpenSSL/0.9.7e mod_ruby/1.2.4 Ruby/1.8.6(2007-03-13) PHP/4.4.2 UNIQUE_ID=SOqCZdIXCRAAAAt5CWA GATEWAY_INTERFACE=CGI/1.1 SERVER_PROTOCOL=HTTP/1.1 REQUEST_METHOD=GET QUERY_STRING= REQUEST_URI=/tech/web/show_env.shtml SCRIPT_NAME=/tech/web/show_env.shtml DATE_LOCAL=Monday, 06-Oct-2008 17:25:57 EDT DATE_GMT=Monday, 06-Oct-2008 21:25:57 GMT LAST_MODIFIED=Wednesday, 10-Oct-2007 12:11:58 EDT DOCUMENT_URI=/tech/web/show_env.shtml DOCUMENT_PATH_INFO= USER_NAME=zytrax DOCUMENT_NAME=show_env.shtml

Not a pretty layout but now you know.