Tron is a 1982 American science fiction film written and directed by Steven Lisberger. It stars Jeff Bridges as the protagonist hacker Kevin Flynn, Bruce Boxleitner as security program Tron (and Tron's "user", Alan Bradley), Cindy Morgan as program Yori (and her "user", Dr. Lora Baines), Barnard Hughes as the tower guardian Dumont (and his user, Dr. Walter Gibbs) and Dan Shor as Ram. David Warner plays all three main antagonists: the program Sark, his "user", Ed Dillinger, and the voice of the chess program artificial intelligence Master Control Program. The film tells the story of Flynn as he attempts to hack into the ENCOM mainframe to prove that Dillinger has appropriated his work, but ends up being transported into the digital world itself as a unique program/user. There, he teams up with Tron to defeat the Master Control Program, who has been controlling the digital world.

Development of Tron began in 1976 when Lisberger became fascinated with Pong. Along with producer Donald Kushner, he set up an animation studio to develop Tron with the intention of making it an animated film. However, after talks with Information International, Inc., Lisberger decided to include live-action elements with the computer animation. Various film studios rejected the storyboards for the film until the project was set up at Disney. There, backlit animation was combined with the computer animation and live-action. Tron was released on July 9, 1982 in 1,091 theaters in the United States.

The film received positive reviews from critics. Critics praised the visuals and acting, but criticized the storyline. The film also was a box office success, grossing $33 million in the United States. Tron received nominations for Best Costume Design and Best Sound at the 55th Academy Awards, and received the Academy Award for Technical Achievement 14 years later. Over time, Tron developed into a cult film and eventually spawned into a franchise, which consists of multiple video games, comic books and an animated television series. A sequel titled Tron: Legacy was directed by Joseph Kosinski and was released on December 17, 2010; it also saw the return of Lisberger, Bridges, and Boxleitner to the franchise and received mixed reviews from critics.