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# RLG and OCLC union catalogs
- URL: https://www.lorcandempsey.net/rlg-and-oclc-union-catalogs/
- Published: 2007-09-27T21:46:12.000Z
- Updated: 2020-10-28T09:31:13.000Z
- Author: Lorcan Dempsey
- Tags: #MPOW, Systems

I am occasionally asked what was the impact on Worldcat of the addition of the RLG Union Catalog.  
52M records were processed as part of the load. 41.7M records were matched to existing Worldcat records. There was a net add to Worldcat of 8M records.