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About UDC Online

The official text of the UDC is the Master Reference File (MRF), the database created and maintained by the UDCC. It is updated at the end of every year in accordance with agreed amendments.

This online edition of UDC is derived from the Master Reference File.

For more information or to subscribe please contact the British Standards Institution:
email: UDC@bsi-global.com
tel: +44 (0) 20 8996 7555
fax: +44 (0) 20 8996 7001

UDC Online BSI 2005. BSI are the copyright owners of the UDC Online product
All rights in the English-language versions of UDC rest in perpetuity with BSI.