The 1982 sci-fi film 'Tron' is a classic in the genre. It follows the story of a computer programmer who is transported into a digital world inside a computer mainframe. The film was revolutionary for its time, as it was one of the first to use computer-generated imagery and 3D animation. It was also the first feature film to use extensive wire-frame and vector graphics. The film was a box office success and has since become a cult classic.