The Library of Congress is a legislative branch agency based mainly on Capitol Hill in Washington, D.C. Its primary work is serving Congress. The Library also keeps more than 158 million items in its physical collections, ranging from books and manuscripts to photographs, film, and sound recordings, and over 37 million items online.
Several offices operate within the Library. The Congressional Research Service prepares research and analysis for members and committees of Congress. The U.S. Copyright Office administers copyright registration and records. The Law Library of Congress handles legal research, and the National Library Service for the Blind and Print Disabled provides materials in accessible formats.
The Library hires librarians, catalogers, and archivists, along with conservation and digitization specialists who care for the collections. Legal and policy staff support the research and copyright offices, and the agency also employs information technology and administrative workers.