Electronic Labyrinth: THX 1138 4EB (1967)
Electronic Labyrinth: THX-1138 4EB is a 1967 science fiction short film written and directed by George Lucas while he attended the University of Southern California's film school. The short was reworked as the 1971 theatrical feature THX-1138.
In 2010, this film was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".