Technologies in 2001: A Space Odyssey well, such as a nervous breakdown—as Hal did in the film. Clarke noted that, contrary to popular rumor, it was a complete coincidence that each of the letters of Hal's name immediately preceded those of IBM in the alphabet. The meaning of HAL has been given both as "Heuristically programmed ALgorithmic computer" and as "Heuristic ALgorithmic computer". The former appears in Clarke's novel of "2001" and the latter in his sequel novel "2010". In computer science, a heuristic is a programmable procedure not necessarily based on fixed rules, producing informed guesses often using trial-and-error. The results can be false such
2001: A Space Odyssey (film) in the 2.21:1 aspect ratio. The general release of the film in its 35mm anamorphic format took place in autumn 1968 and used either a four-track magnetic stereo soundtrack or an optical monaural soundtrack. The original 70-millimetre release, like many Super Panavision 70 films of the era such as "Grand Prix", was advertised as being in "Cinerama" in cinemas equipped with special projection optics and a deeply curved screen. In standard cinemas, the film was identified as a 70-millimetre production. The original release of "2001: A Space Odyssey" in 70-millimetre Cinerama with six-track sound played continually for more than a