The article is devoted to self-service libraries and self-service elements in libraries. The aim of the work is to determine the place and role of self-service libraries in the complex system of libraries in the modern society. The author describes various aspects of the use of automated self-service systems and digital technologies in the activities of libraries. The paper analyses the reasons that encourage libraries to switch to self-servicing. The introduction of this form of service is considered as an opportunity to increase the efficiency of the staff work, to free up time for creative activity previously spent on routine processes. The author gives examples of the use of automated self-service systems in libraries. During self-service hours, library users independently receive and hand over books using automatic book distribution stations, library book vending machines. With the help of self-service systems, librarians keep statistics of library visits, identify the most popular books, create lists of readers delaying the return of books, etc. The author analyses the problems faced by librarians working under the system of full or partial self-service. Abroad, the massive introduction of self-service elements in libraries has caused an ambiguous reaction from library staff. Many of them took the innovation as a reason to reduce the number of library staff. Such fears are groundless, since the functions of library specialists are not limited to the issuance of books. The scope of their professional activity is much wider, and knowledge, skills and experience are indispensable when qualified intellectual assistance is required. In the age of digital technologies, self-service in libraries is becoming an integral element of creating a comfortable environment for readers. At the same time, readers still need the help of library staff. Automated self-service systems have a rich potential, if traditional library values are preserved.