The national library serving the United States Congress.
The Library of Congress' mission is to make its resources available and useful to the Congress and the American people and to sustain and preserve a universal collection of knowledge and creativity for future generations. The Library serves as the research arm of Congress and is recognized as the national library of the United States. Its collections comprise the world's most comprehensive record of human creativity and knowledge. Open to those above high school age without charge or special permission, it is the world's largest library and a great resource to scholars and researchers. http://lcweb.loc.gov
the library of the American Congress and the national library of the United States. Holder of the largest library collection in the world, LC also creates standards for other libraries, in particular large public and academic libraries, through the development of the Library of Congress Classification System and Subject headings.