Alternate Titles: Information Professional, Special Librarian, Medical Librarian, Government Document Librarian, School Media Specialist, Automated-Systems Librarian

The Librarian maintains library collections of books, serial publications, and documents, audiovisual and other materials and assists groups and individuals in locating and obtaining materials, furnishes information on library activities, facilities, rules and services, explains and assists in use of reference sources, such as card or book catalog, or book and periodical indexes to locate information. This worker issues and receives materials for circulation or use in library, assembles and arranges displays of books and other library materials, maintains reference and circulation materials. The Librarian also answers correspondence on special reference subjects, may compile list of library materials according to subjects or interests, and may select, order, catalog and classify materials.  Librarians generally need a master's degree in library science. Many States require school librarians to be licensed as teachers and to have taken courses in library science. Experienced librarians may advance to administrative positions, such as department head, library director, or chief information officer.