January 2004 according to the OCLC Research News Archive. http://www.oclc.org/research/news/2004/01-26.html
Karen On Wed, May 1, 2013 at 11:06 AM, Bigwood, David <dbigw...@hou.usra.edu>wrote: > On Catalogablog there is an posting on Tuesday, September 21, 2004. > > Sincerely, > David Bigwood > > > > -----Original Message----- > From: Code for Libraries [mailto:CODE4LIB@LISTSERV.ND.EDU] On Behalf Of > David J. Fiander > Sent: Wednesday, May 01, 2013 10:35 AM > To: CODE4LIB@LISTSERV.ND.EDU > Subject: [CODE4LIB] When did OCLC's original xISBN service launch? > > According to the Code4Lib mailing list archives, the service moved from > "experimental" to production, and changed format, in February, 2007, but > the earliest reference to the service in the archives is a question from > Thom Hickey in May, 2005 soliciting feedback about what additional > features might be of interest. > > - David >