Stacks at the Library at the Katz CAJS are divided into open and closed collections:
- The 2nd floor Reading Room
Contains books designated REF, i.e. encyclopedias, dictionaries, basic texts, bibliographies and other reference books, current journals and newspapers, as well as current periodicals designated GAL.
- The 3rd Floor Gallery
Includes past issues of selected bound serials, indexes, and the proceedings of the World Congress of Jewish Studies. All these are also designated GAL.