the largest library in the United States, located in Washington, DC and maintained largely by federalappropriations. Its original purpose was to provide research facilities for members of Congress; today it serves the public as well. Most copyrighted publications are cataloged by the Library of Congress, whose classification system is used by major libraries around the country. Its collection of printed material is one of the largest in the world. —State of ManCongress Approved Gls (14.5.92)