A form field that can be selected by clicking a box. When a box is selected, it is usually displayed with a check mark or X. Check boxes are usually grouped to represent a set of non-exclusive choices. See also radio button.

(Common Gateway Interface) A standard method of extending Web server functionality by executing programs or scripts on a Web server in response to Web browser requests. A common use of CGI is in form processing, where the Web browser sends form data to a CGI script on the server, the script integrates the data with a database, and sends back the results as a Web page. Use of CGI can make a Web page much more dynamic and add interactivity for the user. check box