This is Bill Kroyer. It's May of 1982, and he is at Disney Studios in Burbank, sitting at a Chromatics CGC 7900 computer terminal. He is looking over low-resolution, 300 line wireframe 'pencil test' renders of a CGI sequence from the movie he is working on as a 'Computer Image Choreographer': Disney's groundbreaking video game themed film "Tron".
The renders are created at MAGi, one of four CGI effects houses working on Tron, in Elmsford, New York. On top of the Chromatics you can see the 1200 baud acoustic modem that ties the terminal to MAGi, on the other side of the country. Upon viewing the renders, Kroyer and his colleague at Disney, Jerry Rees, can recommend changes to MAGi and see the results in minutes.
Tron was the first large-scale use of CGI in feature filmmaking, a process that is ubiquitous in movies today.