Paul Otlet was a Belgian, *1868, died 1944, who perfected the Dewey Classification system as "the Universal Decimal Classification", in his lifetime alone totalling 17 million index cards of human knowledge.
Overview：Paul Otlet was a Belgian, *1868, died 1944, who perfected the Dewey Classification system as "the Universal Decimal Classification", in his lifetime alone totalling 17 million index cards of human knowledge.
