A global library resource
Like the knowledge it describes, WorldCat grows steadily every day from the contributions of member libraries in the OCLC cooperative.
When you contribute library data to WorldCat, you help grow the world’s largest and most comprehensive catalog of library resources from around the world, with more than 372 million bibliographic records that represent more than 2.3 billion items held by participating libraries.
WorldCat facts and statistics
Every 10 seconds
How often a record is added
Number of languages and dialects represented
Every 5 seconds
How often a request is filled through WorldCat Resource Sharing
Number of bibliographic records
Number of holdings