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.
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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
 
News
New UDC Online in French
02/09/2018
UDC Online in the French language CDU Online : Français is now available and a free testing period is open until December 1st. Information & library professionals and educators are invited to apply for a free trial account.
General Data Protection Regulation
25/05/2018
The General Data Protection Regulation (GDPR) came into force on 25th May 2018 and provides data protection and privacy rights to citizens of the European Union. For more information about the UDC Consortium and the GDPR, please read our updated privacy policy.
Events
October
23
November
25
ISKO Maghreb 2018: 7th International ISKO Symposium "Knowledge Organization in the perspective of Digital Humanities"
Bejaïa (Algeria)