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HAL 9000 (Heuristically programmed ALgorithmic computer) is a fictional character in Arthur C. Clarke's Space Odyssey saga. The novels, along with two films, begin with 2001: A Space Odyssey, released in 1968.
HAL is an artificial intelligence, the sentient on-board computer of the spaceship Discovery. HAL is usually represented only as his television camera "eyes" that can be seen throughout the Discovery spaceship. The voice of HAL 9000 was performed by Canadian actor Douglas Rain. In the book, HAL became operational on January 12, 1997 (1992 in the movie)[1] at the HAL Plant in Urbana, Illinois, and was created by Dr. Chandra. In the 2001 film, HAL is depicted as being capable not only of speech recognition, facial recognition, and natural language processing, but also lip reading, art appreciation, interpreting emotions, expressing emotions, and reasoning.
HAL is never visualised as a single entity. He is, however, portrayed with a soft voice and a conversational manner. This is in stark contrast to the human astronauts, who speak in terse monotone, as do all other actors in the film. HAL is therefore portrayed as the most, or only, feeling being in the film, a trait which encourages audience bonding with the character and emphasises the ironic overtones of a culture where the most human entity is a machine
http://en.wikipedia.org/wiki/HAL9000