use of JavaScript and is therefore no longer accessible for users of older web browsers or those that have JavaScript disabled for security reasons. The update also removed users' book reviews and replaced them with reviews from Amazon subsidiary GoodReads. System architecture Local catalogs of many OCLC member libraries are intermittently synchronized with the WorldCat database. WorldCat allows participating institutions to add direct links from WorldCat to their own local catalog entries for particular items, which enables the user to click through to the local catalog to quickly determine an item's real-time status (for example, whether or not it is checked out). In a small percentage of libraries, the local catalog is also run by OCLC using an integrated library system called WorldCat Discovery and WorldShare Management Services. Library contributions to WorldCat are made via the Connexion computer program, which was introduced in 2001; its predecessor, OCLC Passport, was phased out in May 2005. Cataloging librarians may also use the WorldShare Record Manager or WorldCat Metadata API for similar purposes. See also Copac Faceted Application of Subject Terminology (FAST) List of academic databases and search engines Open Library References Further reading See also: Information about licensing of WorldCat records and some other OCLC data. External links Information on the OCLC website about WorldCat. Bibliographic databases and indexes Cooperatives Library catalogues OCLC