Overview

OCLC is a nonprofit, member-governed organization that provides shared technology, metadata, and research services to libraries around the world. Founded in 1967 as the Ohio College Library Center, it later became known as the Online Computer Library Center and now operates as OCLC, Inc. The organization helps libraries cooperate on cataloging, discovery, and resource sharing, and supports public access to bibliographic information so people can find more information.

Core services and products

OCLC maintains a number of interrelated services used by libraries and researchers. Its most prominent product is WorldCat, a global union catalog built from the contributions of member libraries. WorldCat aggregates bibliographic records to enable unified searching and to support interlibrary loan and local catalog enhancement. Other common services include centralized cataloging records and authority control, digital collection management tools, cloud-based library platforms, and research and development through its research arm.

  • Shared cataloging and metadata (records used by multiple libraries)
  • Resource sharing and interlibrary loan infrastructure
  • Digital repository and collection services
  • Standards and identifiers used in library workflows (for example, OCLC control numbers)

History and development

OCLC was created to reduce duplicated cataloging work among academic libraries by using computers to share bibliographic records. Its founding director, Fred Kilgour, promoted cooperative automation for libraries. Over decades the organization expanded beyond its Ohio origins, adopting networked cataloging and adding services for public, special, and national libraries. In 2017 it simplified its public name to OCLC, Inc., reflecting a global scope while remaining a nonprofit cooperative headquartered in Dublin, Ohio.

Uses, importance, and distinctions

WorldCat and OCLC services have become foundational to how libraries describe, discover, and share materials. Libraries contribute bibliographic and authority data to a shared pool, which reduces redundant work and promotes consistent metadata. Researchers, students, and the public commonly encounter WorldCat as a discovery tool and a way to locate items held by member libraries. As a cooperative, OCLC differs from commercial vendors by centering membership and shared infrastructure, even though it offers fee-based services to sustain operations.

Notable facts

More than 30,000 libraries across over 100 countries participate in OCLC’s cooperative network. The organization issues persistent identifiers and supports initiatives in metadata standards and library research. For more about OCLC’s mission as a library service and its research activities, see the resources linked through its sites and portals.