For example, the WorldCat database (sponsored by OCLC, Online Computer Library Center at <a href="http://oclc.org/home/)">http://oclc.org/home/)</a> is a union catalog that hosts about 48 million records (as of Spring 2002) in 400 languages and indexes a heterogeneous collection of material including books, maps, films and slides, sound recordings, and so on.