FirstSearch is a comprehensive reference search service that delivers content from dozens of large databases and 10 million of articles including bibliographic, full-text and full-image material. Its main feature is access to more than 258 million records via WorldCat, the Online Union Catalog produced by the Online Computer Library Center (OCLC), a nonprofit computer library service and research cooperative including more than 10,000 libraries. Through an intuitive web interface and local customization options, FirstSearch offers also access to electronic journals, library holdings, and interlibrary loan, displaying their records in different languages such as English, Spanish, Chinese, Japanese, Korean. Well organized, regularly updated and user-friendly, FirstSearch requires nonetheless different levels of paid subscriptions to fully access its services. However search and navigation in this website allow for free access to a good quantity and quality of links to other webresources for further inquiries and to many metadata on the desired records.