1. Editing and cataloging: This kind of work is mainly responsible for the procurement, cataloging, classification and indexing of library literature resources to facilitate readers' retrieval and utilization. This kind of work needs certain professional knowledge and skills, such as library science, informatics, cataloging rules, classification and so on. This kind of work is generally carried out in the office, not directly facing the readers.

2. Circulation work: This kind of work is mainly responsible for borrowing, renewing, booking and urging the library literature resources to ensure the effective circulation and utilization of the literature resources. This kind of work requires a certain sense of service and communication skills, such as politeness, patience and enthusiasm. This kind of work is generally carried out in the reading room or cashier's desk, directly facing the readers.

3. Reference work: This kind of work is mainly responsible for providing readers with services such as query, retrieval and recommendation of various literature information to meet the different needs and expectations of readers. This kind of work requires certain professional knowledge and skills, such as information retrieval, literature analysis and information evaluation. This kind of work is generally carried out at the reference desk or e-mail, directly or indirectly facing the readers.

4. Reading management: This kind of work is mainly responsible for the maintenance and management of the reading environment and order in the library to ensure the reading experience and safety of readers. This kind of work needs to have certain management consciousness and ability, such as rules and regulations, coordination and communication, emergency treatment, etc. This kind of work is generally carried out in the reading room, directly facing the readers.

5. Other work: In addition to the above-mentioned main work, the library also has some other auxiliary or special work, such as book administration management, financial management, personnel management, equipment and facilities maintenance management, digital resource construction management, and special collection literature management. These tasks need to be determined according to the different types and scales of libraries, and generally do not directly face readers.

The above is my answer, I hope it will help you.