Library technicians and assistants typically do the following:

• Loan library materials to patrons and collect returned materials
• Sort and reshelve returned books, periodicals, and other materials
• Catalogue and maintain library materials
• Handle interlibrary loans
• Register new patrons and issue library cards
• Answer routine reference questions
• Teach patrons how to find and use library resources
• Maintain computer databases used to locate library materials
• Answer the phone, organize files, and perform other routine clerical tasks
• Help plan and participate in special programs, such as used-book sales, story times, and outreach programs

A librarian usually supervises library technicians and assistants. Library technicians and assistants usually help patrons find information and organize library materials. However, library technicians typically have more responsibilities than do library assistants, such as administering library programs and overseeing lower level staff.

Library technicians and assistants in smaller libraries have a broader range of duties. In larger libraries, they tend to specialize in a particular area, such as user services or technical services. Technicians and assistants specializing in user services assist library patrons with locating resources and information. Those specializing in technical services research, acquire, catalog, and process materials to be added to the library's collections.

The following are examples of types of library technicians and assistants:

Academic library technicians and assistants help students, faculties, and staff in colleges and universities access resources and information related to coursework or research projects. Some help teach students how to access and use library resources. They may work at service desks for reserve materials, special collections, or computer labs.

Public library technicians and assistants work in community libraries to serve members of the public. They help patrons find books to read for pleasure; assist patrons with their research; and teach patrons how to access the library's resources. Some technicians in public libraries may help plan programs for users, such as story time for children, book clubs for teens or adults, or other educational or recreational activities.

School library technicians and assistants show students how to find and use library resources, maintain textbook collections, and they help teachers develop curriculum materials.

Special library technicians and assistants work in libraries in government agencies, corporations, museums, law firms, and medical centers. They assist users, search library resources, compile bibliographies, and provide information on subjects of interest to the organization.