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Library of Congress Classification System

A guide to how subjects are organized within the Library of Congress Classification System.

Guide to classes

The links in the box below will take you to a detailed guide to the LC class of the linked letter. For a fast review of all the LC classes, see this two page pdf, Guide to LC classification at Booth.

LC class guides in detail

CLASS SUBJECT
A    General Works
B    Philosophy, Psychology, Religion
C    Auxiliary Sciences of History
D    History: General and Old World
E-F    History: Western Hemisphere
G    Geography, Anthropology, Recreation
H    Social Sciences
J    Political Science
K    Law
L    Education
M    Music
N    Fine Arts
P    Language and Literature
Q    Science and Mathematics
R    Medicine
S    Agriculture
T    Technology
U    Military Science
V    Naval Science
Z    Bibliographies
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