Search The Directory The Web for Home > Reference > Libraries > Library and Information Science > Technical Services > Cataloguing > Classification > UDC New! Submit a site   whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   UDC - UDC "Shelfmark" Order   UDC Consortium - Homepage of the organization which oversees Universal Decimal Classification. Includes extensions and corrections, UDC news, the Master Reference File (a database providing a standard version of approximately 60,000 subdivisions), publications, and information about consortium members and license holders.   UDC in Brief - "The Universal Decimal Classification (UDC) is an indexing and retrieval language in the form of a classification for the whole of recorded knowledge, in which subjects are symbolized by a code based on arabic numerals. It was designed by the Belgian bibliographers Paul Otlet and Henry Lafontaine at the end of the 19th century, and has been improved and developed ever since." Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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