Understanding the Library of Congress Classification System
Materials in this library are shelved according to the Library of Congree Classification System, which separates all knowledge into 20 classes. Each class corresponds to a letter of the alphabet with subclasses identified by combinations of letters and subtopics by numerical notations.
Listed below are the 20 classes (with subclasses) and their corresponding letters, the first letters in LC Call Numbers.
A. General Works
AC Collections
AE Encyclopedias
AG Dictionaries
AI Indexes
AM Museums
AN Newspapers
AP Periodicals
AS Academies and Societies
AY Yearbooks, Almanac and Directories
AZ History of Scholarship
B. Philosophy, Psychology and Religion
B Philosophy (General)
BC Logic
BD Speculative Philosophy
BF Psychology, Parapsychology and Occultism
BH Aesthetics
BJ Ethics, Social usages and Etiquette
BL Religions and Mythology
BM Judaism
BP Islam, Bahaism and Theosophy
BQ Buddhism
BR Christianity
BS Bible
C. Auxiliary Sciences of History
C General
CB History of Civilization
CC Archaeology
CD Diplomatics. Archives. Seals
CE Technical Chronology. Calendar
CJ Numismatics
CN Inscriptions. Epigraphy
CR Heraldry
CS Genealogy
CT Biography
D. History: General and Old World
D General
DA Great Britain
DB Austria. Hungary. Czecheslovakia
DC France
DD Germany
DE Mediterranean Region - Classical
DF Greece
DG Italy
DH Low Countries: Belgium. Luxemburg
DJ Netherlands (Holland)
DJK Eastern Europe
DK Soviet Union. Poland
DL Northern Europe. Scandinavia
DP Spain. Portugal
DQ Switzerland
DR Balkan Peninsula. Turkey
DS Asia
DT Africa
DU Oceania. Australia. New Zealand
DX Gypsies
E-F. History Western Hemisphere
E America
F U.S. local history. Canada. Latin America
G. Geography, Anthropology and Recreation
G General. Atlases. Maps
GA Mathematical Geography. Cartography
GB Physical Geography
GC Oceanography
GF Human ecology. Anthropogeography
GN Anthropologie
GR Folklore
GT Manners and Customs
GV Recreation. Sports. Games
H. Social Sciences
H General
HA Statistics
HB Economics
HC Economic History
HD Land. Agriculture. Industry. Labor
HE Transportation and communications
HF Commerce
HG Finance
HJ Public Finance
HM Sociology
HN Social History
HQ Family. Marriage. Women
HS Socities. Clubs
HT Communities. Classes. Races
HV Social Pathology. Social service. Criminology
HX Socialism. Communism
J. Political Science
J General Legislative and Executive Papers
JA Political Science - General
JC Political Theory. The State
JF Constitutional History - General
JK Constitutional history - United States
JL Constitutional history - Canada. Latin America
JN Constitutional History - Europe
JQ Constitutional history - Asia. Africa. Australia. Oceania
JS Local Government
JV Colonies and Colonization
JX International Law. International relations
K. Law
K General
KD United Kingdom and Ireland
KDZ America. North America. OAS
KE Canada
KF United States
KG-KH
L. Education
M. Music
N. Fine Arts
P. Language and Literature
Q. Science
R. Medicine
S. Agriculture
T. Technology
U. Military Science
U General
UA Armies
UB Military administration
UC Maintenance and transportation
UD Infantry
UE Calvary and Armored cavalry
UF Artillery
UG Military engineering, Air forces and Air warfare
UH Other services
V. Naval Science
V General
VA Navies
VC Naval maintenance
VD Naval seamen
VE Marines
VF Naval ordinance
VG Minor services of navies
VK Navigation and Merchant marine
VM Naval architecture and Marine engineering
Z. Bibliography and Library Science
Z Books, Book industries, Library science and Bibliography
