2001: A Space Odyssey is a 1968 science fiction film produced and directed by Stanley Kubrick, and written by Kubrick and Arthur C. Clarke. The film follows a voyage to Jupiter with a sentient computer named Hal-9000, after the discovery that a mysterious black monolith affected humanevolution. The film deals with the themes of existentialism, human evolution, technology, artificial intelligence, and extraterrestrial life. It is noted for its scientifically accurate depiction of space flight, pioneering special effects, and ambiguous imagery. It uses sound and minimal dialogue in place of traditional narrative techniques, and the soundtrack consists of classical music. In 1991, it was selected for preservation by the National Film Registry as being "culturally, historically, or aesthetically significant".