OCLC is a nonprofit global library organization that provides shared technology services, original research, and community programs so that libraries can better fuel learning, research, and innovation.

WorldCat is the manifestation of the creativity and innovation of the staff of OCLC and thousands of librarians. Unique in scale and unparalleled in data quality, WorldCat makes library collections findable and accessible around the world.

Top interlibrary loan requests: June 2026 Here are the ten books most frequently requested for interlibrary loan in June 2026 through the OCLC resource sharing network of 10,000+ libraries worldwide.

It was founded in 1967 as the Ohio College Library Center, then became the Online Computer Library Center as it expanded. In 2017, the name was formally changed to OCLC, Inc. [4] OCLC and thousands of its member libraries cooperatively produce and maintain WorldCat, the largest online public access catalog in the world. [5]

Copyright © 2001-2026 OCLC. All rights reserved. Domestic and international trademarks and/or service marks of OCLC, Inc. and its affiliates.

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OCLC makes WorldCat itself available free to libraries, but the catalog is the foundation for other subscription OCLC services (such as resource sharing and collection management). WorldCat is used by librarians for cataloging and research and by the general public.

Find instructional materials for OCLC products and services. OCLC is a global library cooperative that supports libraries through technology services, original research and community programs.

OCLC is a global library organization that provides shared technology services, original research, and community programs for its membership and the library community at large.

For information and insights on the topics and challenges faced by the library, archive, and museum communities check out the OCLC Research blog, Hanging Together.