Universal Decimal Classification
UDC is one of the most widely used classification schemes for all fields of knowledge. It is used in libraries, bibliographic, documentation and information services in over 130 countries around the world and is published in over 40 languages.
Follow us:  
UDC Consortium
The UDCC is a non-profit association of publishers established to maintain, develop and distribute the UDC for the benefit of its users. Apart from its strategic, managerial and promotional responsibilities, the UDCC also appoints an editorial team and advisory board to oversee the content of the scheme and contribute to its regular revision in order to reflect new knowledge.
UDC Books and Schedules
Special offer for UDCC publications extended
Due to popular demand, we've extended the sale period for selected UDC Consortium publications until the 29th November.
Outputs from the International UDC Seminar 2015, Lisbon 29-30 October 2015
The International UDC Seminar entitled "Classification & Authority Control: Expanding Resource Discovery" took place in the National Library of Portugal in Lisbon, on 29-30 October 2015. Presentation slides and posters are available from the conference website.The proceedings of the conference were published by Ergon.
Terminology and knowledge organization in preserving digital memories - organized by Associazione Italiana per la Terminologia
Rende, Calabria (Italy)