Class A – General Works
Class B – Philosophy, Psychology, Religion
Class C – Auxiliary Sciences of History
Class D – World History and World History of Europe, Asia, Africa, Australia, New Zealand, etc.
Class E-F – History of Americas
Class G – Geography, Anthropology, Recreation
Class H – Social Sciences
Class J – Political Science
Class K - Law
Class L - Education
Class M – Music and Books on Music
Class N – Fine Arts
Class P – Language and Literature
Class Q - Science
Class R - Medicine
Class S - Agriculture
Class T - Technology
Class U – Military Science
Class V – Naval Science
Class Z – Bibliography, Library Science, Information Resources (General)