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The Concept Map you are trying to access has information related to:
1823_1943, GENERACIÓN 1823 - 1943 Tubo de vacío (1920), GENERACIÓN 1823 - 1943 Aritnómetro (1823), GENERACIÓN 1823 - 1943 Máquina de Estadística (1890), GENERACIÓN 1823 - 1943 Colossus (1943)