Paul Marie Ghislain Otlet (/ɒtˈleɪ/; French: [ɔtle]; 23 August 1868 – 10 December 1944) was a Belgian author, entrepreneur, visionary, lawyer and peace activist; he is one of several people who have been considered the father of information science, a field he called "documentation". Otlet created the Universal Decimal Classification, one of the most prominent examples of faceted classification.