Collections

General collection of the Bulgarian Academy of Sciences - 1 919 626 , Books - 1 038 021, Periodical publications – 854 491, Special editions – 27 114, Current periodical titles – 3 477. 
Collections of the Central Library - 629 110, Books and Special editions – 412 558 , Periodical publications – 216 552.
International exchange with over 1447 institutions and libraries in 73 countries, yearly acquisition of 2240 periodical editions and over 1872 books; all academic editions (editions of the Bulgarian Academy of Sciences) are disseminated – 15 300 books and periodicals.

Special Collections of the Central Library
Early Printed Editions (books and periodicals till 1876) - 1 095 
Microfilms of Slavonic and Greek manuscripts – 350
Synai Collection (microfilms of Greek, Arab, Syrian, Georgian, Slavonic manuscripts) – 1 677
Slavonic Studies - 3 289 
Reprints - 1 837
Theses defended in Bulgaria - 11 552
Microfilms of contemporary editions
Editions of the World Bank
Editions of UN
Bulgarian Academica (Editions of the Bulgarian Academy of Sciences), reference books – over 15 000
Book science, library science, bibliography – over 7 000

Private Collections
Over 50 collections, among which:
Marko Balabanov, Member of BAS;
Acad. Angel Balevski;
Prof. Nikolai Dilevski;
Dr. Nikola Sakarov, economist;
Felix Kanitz, Foreign Honorary Member of BAS;
Prof. Nikola Milev;
Vasil D. Stoyanov, Member of BAS;
St. Mihailovski; T. St. Tomov; R. Rusev; V. Ivanov;
Books from the library of the tsar family