Using the runtime configuration variable CGI_NO_CACHE, you can choose whether or not the HTML output of your CGI program will be cached by the requesting client. By default, the runtime generates "Pragma: no-cache" in the HTTP response header that gets sent to the standard output stream. If you set CGI_NO_CACHE to "0" (off, false, no) in the runtime configuration file, the runtime suppresses this line of the response header. The default value is "1" (on, true, yes).