OCLC FirstSearch / WorldCat Discovery Services Illinois State Library

The Illinois State Library's FirstSearch/WorldCat Discovery subscription gives ILLINET libraries unlimited use of both the FirstSearch and WorldCat Discovery interfaces. OCLC will continue to offer both services in the future.


FirstSearch delivers the precise, full-featured WorldCat searching required by library users and library staff in areas such as reference, interlibrary loan and collection development to do their jobs.

WorldCat Discovery

WorldCat Discovery provides broad searching of WorldCat and e-content collections that meets the needs of more general searchers. Through WorldCat Discovery, people can search the entire WorldCat database of more than 400 million records, plus a central index of more than 2,400 e-content collections. The service is also the user-facing interface to OCLC’s WorldShare Management Services. WorldCat Discovery will replace WorldCat Local on a date to be determined.

Along with access to WorldCat, our subscription enables ILLINET member libraries to search databases that were included in the former FirstSearch "base package" (ArticleFirst, Electronic Books, Electronic Collections Online, ERIC, GPO Monthly Catalog, MEDLINE, OAIster, PapersFirst, Proceedings First, SCIPIO, WorldCat Dissertations and Theses, ArchiveGrid Note: Clase and Periodica is available only in FirstSearch.)

Increased Web Visibility

The State Library's subscription also gives Illinois library collections in WorldCat visibility on WorldCat.org, and on search engines and popular consumer and research websites such as Google Books, Google Scholar, FamilySearch, Goodreads and Wikipedia.

The Choice is Yours: Use FirstSearch and WorldCat Discovery

Under the existing State Library subscription, you can use one or both interfaces, to meet the needs of your library's users.

ILLINET OCLC Group Services Members

ILLINET OCLC Group Services Members
Use the familiar FirstSearch interface or request your library's unique WorldCat Discovery URL to use WorldCat Discovery. Your users will find materials from your library’s collections, the collections of other Illinois libraries in WorldCat, and libraries worldwide in search results.

ILLINET OCLC FirstSearch Only Members (Use OCLC to access FirstSearch, but do not use OCLC for cataloging or interlibrary loan)
Use the familiar FirstSearch interface or use the Illinois WorldCat Discovery interface to access WorldCat, FirstSearch databases and a large central index of e-content collections in a single search.

Training and Documentation

OCLC provides training and documentation resources for both FirstSearch and WorldCat Discovery.