TSV
Universal Decimal Classification - TSV
The Universal Decimal Classification (UDC) is a multilingual classification system for libraries and bibliographic services, developed in 1895 by Paul Otlet and Henri La Fontaine in Belgium. Built upon and improved from Melvil Dewey's Decimal Classification, it is currently used in approximately 150,000 libraries across more than 130 countries worldwide. The system consists of 10 main classes (0-9) and has been translated into over 40 languages, making it one of the most internationally widespread classification systems.
library
classification
knowledge organization
bibliographic
international standard
code slug name description
0 science-knowledge-information Science and Knowledge. Organization. Computer Science. Information. Documentation. Librarianship. Institutions. Publications Covers science, knowledge organization, computer science, information, documentation, librarianship, institutions, and publications.
1 philosophy-psychology Philosophy. Psychology Covers philosophy, metaphysics, logic, ethics, and psychology.
2 religion-theology Religion. Theology Covers religion, theology, mythology, and religious practices.
3 social-sciences Social Sciences Covers sociology, political science, economics, law, public administration, and education.
4 vacant (Vacant) A vacant class reserved for future expansion.
5 mathematics-natural-sciences Mathematics and Natural Sciences Covers mathematics, astronomy, physics, chemistry, earth sciences, and biology.
6 applied-sciences-medicine-technology Applied Sciences. Medicine. Technology Covers medicine, engineering, agriculture, home economics, management, and chemical technology.
7 arts-recreation-entertainment-sport The Arts. Recreation. Entertainment. Sport Covers fine arts, music, theater, film, recreation, entertainment, and sports.
8 language-linguistics-literature Language. Linguistics. Literature Covers linguistics, languages, literature, and literary criticism.
9 geography-biography-history Geography. Biography. History Covers geography, biography, archaeology, and history.