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.
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Problems with UDC Summary access
21/09/2017
This is information to UDC Summary users who have noticed that udcsummary.info is currently not available with the message "This domain registration expired on 09/15/2017". Please note that this is due to an error on the part of our hosting provider and ongoing issues with their automatic domain renewal service. We are told that it may take up to 24 hours to resolve this. The UDC Summary will be back again as soon as this is resolved.
Early Bird Registration closes 30 June: International UDC Seminar 2017, London, 14-15 September 2017
29/06/2017
The International UDC Seminar 2017 "Faceted Classification Today: Theory, Technology and End Users" will take place in London on 14-15 September 2017 at Wellcome Collection. Do not miss your early bird registration discount!