OCLC Control Number
The OCLC Control Number is a unique number associated with a record in WorldCat®. OCLC increased the length of the OCLC Control Number in 2013 to accommodate a variable-length number string. Learn more about the expansion of the OCLC Control Number, and download sample files for testing with your system.
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21 October 2011
26 June 2010
Watch this space for more WorldShare License Manager news.