CGI Scripts
CGI scripts are small programs that add features to your web site by using the computing power of the web server where your web files are hosted. The most common usage is to handle User Input Forms. CGIs are also used, under the name Server-Side Include (SSI), for giving directives to the server to perform simple functions like counting visitors to a web site or showing when a web page was last updated (See the Server Instructions section of Web Lab's section on Links for some syntax). CGIs are also used for the most common type of imagemap, known as the Server-Side Imagemap (mentioned just below, plus some generic syntax is shown at the end of Server Instructions).
NCSA Sites:
CGI scripts available on Cruzio's Web Server