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) A Space Odyssey" has been analyzed and interpreted by professional critics and theorists, amateur writers and science fiction fans. Peter Kramer in his monograph for BFI analyzing the film summarized the diverse interpretations as ranging from those who saw it as darkly apocalyptic in tone to those who saw it as an optimistic reappraisal of the hopes of mankind and humanity. Questions about "2001" range from uncertainty about its implications for humanity's origins and destiny in the universe to interpreting elements of the film's more enigmatic scenes, such as the meaning of the monolith, or the fate of astronaut David