Penn State Libraries: York Campus Library: LC Classification System

With Library of Congress (LC) Classification System letters and numbers are assigned to materials according to subject matter. LC organizes materials into twenty-one branches of knowledge. These categories (A - Z, but not I, O, W, X and Y), are then divided further by adding additional letters and a set of numbers. This is called a call number.

Here is a list of the broad catagories each letter represents.

A - General Works: encyclopedias, dictionaries, etc.
B - Philosophy / Psychology / Religion
C - Auxiliary Sciences of History
D - History: General and Outside the Americas
E - History: United States
F - History: United States, Local and America
G - Anthropology / Geography / Folklore / Recreation
H - Social Sciences / Economics / Sociology
J - Political Science
K - Law
L - Education
M - Music
N - Fine Arts
P - Language / Literature
Q - Science
R - Medicine
S - Agriculture
T - Technology
U - Military Science
V - Naval Science
Z - Library Science and Information Resources

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