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) its initial release. "2001: A Space Odyssey" is now considered one of the major artistic works of the 20th century, with many critics and filmmakers considering it Kubrick's masterpiece. Director Martin Scorsese has listed it as one of his favourite films of all time. In the 1980s, critic David Denby compared Kubrick to the monolith from "2001: A Space Odyssey", calling him "a force of supernatural intelligence, appearing at great intervals amid high-pitched shrieks, who gives the world a violent kick up the next rung of the evolutionary ladder". Poet and critic Dan Schneider wrote that "2001: A Space Odyssey"