UDC Online is the complete standard up-to-date version of the Universal Decimal Classification scheme. It offers advanced searching and browsing and supports the management of UDC numbers. UDC Online is always aligned to the latest official version of the UDC Master Reference File.

The service gives access to the UDC in multiple languages. Language data is provided by UDC publishers across several countries. More languages will be added as they become available.

This is a subscription based service maintained and managed by the UDC Consortium, the owner of the UDC.

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