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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 332 million bibliographic records that represent more than 2 billion items held by participating libraries.

WorldCat facts and statistics

Every 10 seconds

How often a record is added

Over 485

Number of languages and dialects represented

Every 4 seconds

How often a request is filled through WorldCat Resource Sharing

Every second

How often WorldCat is searched via FirstSearch

332,020,570

Number of bibliographic records

2,211,515,532

Number of holdings