| The web server also makes available information about the user and the server, including such things as what type of browser made the request. |
| A list of environment variables available to the CGI program: |
| GATEWAY_INTERFACE REMOTE_HOST |
| SERVER_NAME REMOTE_ADDR |
| SERVER_SOFTWARE AUTH_TYPE |
| SERVER_PROTOCOL REMOTE_USER |
| SERVER_PORT REMOTE_IDENT |
| REQUEST_METHOD CONTENT_TYPE |
| PATH_INFO CONTENT_LENGTH |
| PATH_TRANSLATED HTTP_FROM |
| SCRIPT_NAME HTTP_ACCEPT |
| DOCUMENT_ROOT HTTP_USER_AGENT (browser) |
| QUERY_STRING HTTP_REFERER |