A professional who provides information service, such as answering questions regarding card catalogs, and assists public in use of bibliographic tools, such as Library of Congress catalog. Responsibilities include:

• Performs routine descriptive cataloging, such as fiction and children's literature.
• Files cards in catalog drawers according to system used.
• Answers routine inquiries, and refers persons requiring professional assistance to librarian.
• Verifies bibliographic information on order requests.
• Directs activities of workers in maintenance of stacks or in section of department or division, such as ordering or receiving section of acquisitions department, card preparation activities in catalog department, or limited loan or reserve desk operation of circulation department.