A professional who maintains library collections of books, serial publications, documents, audiovisual, and other materials, and assists groups and individuals in locating and obtaining materials. Responsibilities include:

• 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.
• Describes or demonstrates procedures for searching catalog files.
• Searches catalog files and shelves to locate information.
• Issues and receives materials for circulation or for use in library.
• Assembles and arranges displays of books and other library materials.
• Maintains reference and circulation materials.
• Answers correspondence on special reference subjects.
• May compile list of library materials according to subject or interests, using computer.
• May select, order, catalog, and classify materials .
• May prepare or assist in preparation of budget.
• May plan and direct or carry out special projects involving library promotion and outreach activity and be designated Outreach Librarian.
• May be designated according to specialized function as Circulation Librarian; Readers'-Advisory-Service Librarian; or Reference Librarian.