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What is WorldCat?

In an expanding universe of information alternatives, why stand alone? WorldCat is a global network of library content and services that uses the Web to let your institution be more connected, more open and more productive. The benefits are clear:

Your collections are catalogued in the premier database of library content

No other catalog is quite like it: WorldCat holds tens of millions of bibliographic records that represent more than one billion items owned by our member libraries. It encompasses hundreds of languages and all formats, including rapidly growing numbers of electronic resources and digital objects. High hit rates, quality-controlled metadata and the application of FRBR principles to records mean your patrons and staff both locate the right resource quickly.

Learn more about WorldCat's global catalog ››

Your content has higher visibility on the Internet

WorldCat allows more people outside the traditional library environment to discover your content with the Web tools they use every day—including Google, Google Books and Yahoo! Search. WorldCat takes data you have contributed about items in your collection, relates it to basic institutional data such as the Web addresses of your catalogue, electronic content servers and other online services, and actively spreads it all across the Web via strategic partnerships and distributed technologies. The result: Information seekers link to your catalogue through search engines, browser toolbars, social networking sites, online booksellers and the WorldCat.org destination site.

Learn more about "Web scale" discovery through WorldCat ››

Participate in something greater

Libraries help people in their communities connect to a larger world. WorldCat does the same thing for libraries: Individual collections are linked together in a massive virtual collection that amplifies value for participating institutions and information seekers everywhere. Patrons perceive you as a door to resources locally and globally, and people in other places discover the treasures you hold.

Help shape what's to come for libraries

Being a part of WorldCat also makes you a part of OCLC, the nonprofit service and research organization that works consistently to lower information costs, identify issues and trends that impact the field, advocate the societal role of libraries and develop new technologies and standards that keep them relevant and vital. Numerous membership channels let you provide guidance to OCLC, engage in dialogue with industry leaders and collaboratively define the future of librarianship.

Learn more about becoming an OCLC member institution ››

Ready to make your library a WorldCat library?

  1. Review how your library contributes to WorldCat
  2. Deutschland:

    OCLC GmbH
    Grünwalder Weg 28g
    82041 Oberhaching
    Deutschland
    T +49-(0)89-613 08 300
    F +49-(0)89-613 08 399
    E deutschland@oclc.org

    OCLC GmbH
    Geschäftsstelle Bonn
    Ubierstr. 92
    53173 Bonn
    Deutschland
    T +49-(0)228-377 369 0
    F +49-(0)228-377 369 20
    E deutschland@oclc.org

    OCLC GmbH
    Geschäftsstelle Berlin
    Alt-Moabit 96 C
    10559 Berlin
    Deutschland
    T +49-(0)30-302 08 686
    F +49-(0)89-613 08 300 (Oberhaching)
    E deutschland@oclc.org

    Schweiz:

    OCLC AG
    St. Jakobs-Straße 96
    4052 Basel
    Schweiz
    T +41-(0)61-378 80 70
    F +41-(0)61-378 80 79
    E schweiz@oclc.org

What's inside WorldCat?

Explore using our cataloging statistics, languages tag cloud and live-cataloging "Watch WorldCat Grow" window

Promote WorldCat

Inform your patrons, administrators and funding bodies with customizable posters, handouts and more

WorldCat Toolbox

Reach service logins, get WorldCat.org-enabled software and code, or look up OCLC libraries and bibliographic formats