The National and General Collection of more than 4.3 million items covers all disciplines. Since 1952 the library has enjoyed the right to receive, free of charge, a copy of every printed work published in Hungary. The library is a national library with the right and obligation of collecting and preserving these deposit copies. The library also houses an almost complete collection of books printed in Hungary before 1952. The University and National Library of the University of Debrecen includes seven library units: Agricultural Science Library, Arts and Sciences Library, Library of the Conservatory,Kenézy Life Sciences Library, Library of the Faculty of Engineering, Library of the Faculty of Education, Social Sciences Library.