The reader is free to use the open-stack holdings in any part of the library. Each book available in the open stacks has a shelfmark with a call number, which can be traced through the online catalogue. Subjects are divided into divisions, classes, and subclasses relevant to the disciplines of learning and their subdivisions or groups of problems. Within each subclass, books are organized with consideration of the type of document, place, time, and detailed subject, in accordance with the principle of descending from broader themes to more detailed subjects. All this is reflected in the call number, which is singular and unique for each book.
Call numbers are alphanumeric.
Periodicals are organized alphabetically, and are located on the stacks at the beginning of each individual subject area. Searching on the stacks. The subject searched for must be first related to a particular area. Information regarding the location of each area is to be found on the maps of the levels. Within the areas the reader will find detailed plans of their disposition.