VARIABLE             MEANING

GATEWAY_INTERFACE    The version of CGI that the server supports. This might be CGI/1.1.

SERVER_NAME          The Internet domain name of the server.

SERVER_PORT          The port number that the Web server is using.

SERVER_PROTOCOL      The name and version of the protocol with which the client sent this request.

SERVER_SOFTWARE      The name and version of the Web server software. This might be NCSA/1.3