![]() When Bowman left the ship to rescue Poole, HAL sabotaged the ship's hibernation systems, killing the three crew members in suspended animation, and then refused to let Bowman's space pod reenter the ship. HAL first attempted to disrupt communications by making it appear that the AE-35 antenna-pointing control unit had malfunctioned, and killed Poole when he attempted to repair the unit during an EVA. This conflicted with the basic purpose of HAL's design-the accurate processing of information without distortion or concealment-causing his circuits to become trapped in what was later diagnosed as a Hofstadter-Moebius loop. HAL fell victim to an induced psychosis (specifically, schizophrenia) during the Jupiter mission, due to his being ordered not to reveal the mission's true purpose to Mission Commander David Bowman or Astronaut Frank Poole. He was even capable of carrying out the mission without human assistance, should the entire crew perish. The 9000 series of computers were considered incapable of error, and so HAL was put in charge of virtually every system on board the Discovery. ![]() Among his instructors were Professor Langley and Dr. ![]() HAL, as he was commonly addressed, was first made operational at the HAL Plant in Urbana, Illinois, on January 12, 1992. The term "HAL" stands for " Heuristically programmed Algorithmic computer" *. Clarke, an artificially intelligent computer on board the spacecraft Discovery for the Jupiter mission in 2001.
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