HAL 9000 is the computer central to Stanley Kubrick’s 2001: A Space Odyssey.
HAL controls the Discovery One spacecraft and speaks in a calm, precise voice while assisting the astronauts on their mission to Jupiter. The computer becomes increasingly important as the crew questions its behavior and reliability. Its conflict with astronaut Dave Bowman is one of the film’s defining dramatic threads.
HAL’s name is commonly remembered through the spelling H-A-L, and the film identifies it as a Heuristically programmed ALgorithmic computer. A popular claim says HAL’s letters were chosen as a one-letter shift from IBM, but Arthur C. Clarke rejected that as intentional; the similarity is generally treated as coincidence.
The voice of HAL was provided by Douglas Rain. Kubrick’s restrained presentation made the computer frightening without relying on a conventional monster design. HAL’s red camera lens, measured speech, and apparent self-awareness helped establish the character as one of science fiction cinema’s most influential artificial intelligences.