The primary function of the Library of Congress is to serve the Congress. ... The Library welcomes public use of its general reference facilities and endeavors to offer the widest possible use of its collections consistent with their preservation and with its obligation to serve the Congress and other government agencies.The Library of Congress is the largest library in the world, with millions of books, recordings, photographs, newspapers, maps and manuscripts in its collections. The Library is the main research arm of the U.S. Congress and the home of the U.S.Copyright Office.Libraries are important cornerstones of a healthy community. ... College students often use the library when they are home for the weekend or for holidays. And the reference resources in public libraries are usually unavailable elsewhere in the community. The library is a unique and valuable resource. 