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.
2012
2016
2015
2008
2009
2013
2020
2023
2014
2011
1996
2022
2021
1979
2024
2018
1997