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
IFLA 2014 General Conference and Assembly
17/08/2014
If you happen to be in Lyon, please join us for our regular UDC Update session at the 2014 IFLA General Conference and Assembly.

Members of the UDC Editorial team will give a brief presentation on the current developments in the UDC, ongoing translation projects, forthcoming publications and events.
Dutch UDC Online Opens
16/02/2014
UDC users in Dutch speaking countries can now access Dutch UDC schedules at UDC Online Nederlands. These are the most comprehensive UDC tables published in Dutch to date. A free two-week trial is now open and an annual subscription will be available after 10 March 2014.