Databases run on computers. Each database is set up according to the needs of its creator.
Many companies design databases to store their financial and research data.
U.S. government agencies create very large databases to hold information. The Online Library Catalog replaces the old card catalog found in most libraries in this country throughout the 20th century. Like the card catalog the new online catalog assists library patrons in locating books and material owned by the library. Unlike the old card catalog, the online catalog may also provide library patrons with access to numerous other library collections. The newest online catalogs even catalog and provide library patrons access to World Wide Web sites on the Internet.