CGI

1. Short for Common Gateway Interface, CGI allows users visiting a web page to send and receive information from a server. A common example of how a CGI script can be used is by allowing a user to type a set of keywords, pass those keywords to a CGI application to process a search, and then return results based off the search to the web page. Often CGI scripts and executables are ran through CGI-BIN directory.
2. Short for Computer Generated Image, CGI is also sometimes abbreviated as CG and is any image or sequence of images that have been generated with the aid of computers. CGI is commonly seen in movies today to generate images or animated objects that appear real but are really not. The 1976 movie Futureworld was the first feature film to use 3D computer generated images.

Also see: Loony bin, Programming definitions