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
Interpretations of 2001: A Space Odyssey experts, such as the structure on the first satellite that Pietrobon refers to as a "conning tower", match the original concept sketch drawn for the nuclear bomb platform. Modelers label them in diverse ways. On the one hand, the "2001" exhibit (given in that year) at the Tech Museum in San Jose and now online (for a subscription) referred merely to "satellites", while a special modelling exhibition at the exhibition hall at Porte de Versailles in Paris also held in 2001 (called "2001 l'odyssée des maquettes (2001: A Modeler's Odyssey)") overtly described their reconstructions of the first satellite as the