The Statewide Illinois Library Catalog, known as SILC, is Illinois' first all inclusive statewide union catalog that integrates WorldCat and the Illinois Library Systems' local consortial OPACs, to provide both shelf status and interlibrary loan capabilities in a single searchable interface.
I-Share is a computer-based library system that provides statewide access to a wealth of information services and resources, including an extensive public access catalog, interlibrary loan, and resource sharing services to the CARLI I-Share libraries. While each I-Share library has its own local catalogs that are individually named, the I-Share catalog, as a union list, provides interlibrary services to the entire Illinois library community.
WorldCat (the OCLC Online Union Catalog) is the world's foremost bibliographic database, with over 46 million bibliographic records representing 400 languages. WorldCat covers information from before 1,000 BC to the present, and includes holdings information from libraries in 45 countries.