AUTH_TYPE  The authentication method that the server uses to validate users when they attempt to access a protected script.  
CONTENT_LENGTH  The length of the content as given by the client.  
CONTENT_TYPE  The data type of the content. Used with queries that have attached information, such as the HTTP queries POST and PUT.  
GATEWAY_INTERFACE  The revision of the CGI specification used by the server. Format: CGI/revision.  
HTTP_<HeaderName>  The value stored in the header HeaderName. Any header other than those listed in this table must be prefixed by "HTTP_" in order for the ServerVariables collection to retrieve its value. 
	Note: The server interprets any underscore (_) characters in HeaderName as dashes in the actual header. For example if you specify HTTP_MY_HEADER, the server searches for a header sent as MY-HEADER. 
LOGON_USER  The Windows NTŪ account that the user is logged into.  
PATH_INFO  Extra path information as given by the client. You can access scripts by using their virtual path and the PATH_INFO server variable. If this information comes from a URL it is decoded by the server before it is passed to the CGI script.  
PATH_TRANSLATED  A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping.  
QUERY_STRING  Query information stored in the string following the question mark (?) in the HTTP request.  
REMOTE_ADDR  The IP address of the remote host making the request.  
REMOTE_HOST  The name of the host making the request. If the server does not have this information, it will set REMOTE_ADDR and leave this empty.  
REQUEST_METHOD  The method used to make the request. For HTTP, this is GET, HEAD, POST, and so on.  
SCRIPT_MAP  Gives the base portion of the URL.  
SCRIPT_NAME  A virtual path to the script being executed. This is used for self-referencing URLs.  
SERVER_NAME  The server's host name, DNS alias, or IP address as it would appear in self-referencing URLs.  
SERVER_PORT  The port number to which the request was sent.  
SERVER_PORT_SECURE  A string that contains either 0 or 1. If the request is being handled on the secure port, then this will be 1. Otherwise, it will be 0.  
SERVER_PROTOCOL  The name and revision of the request information protocol. Format: protocol/revision.  
SERVER_SOFTWARE  The name and version of the server software answering the request (and running the gateway). Format: name/version.  
URL  Gives the base portion of the URL.