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The Library of Congress Classification System
How the Library Shelves Its Books
The library shelves its books according to 21 branches of knowledge represented by letters. These letters are determined by the
Library of Congress and have further subdivisions using combinations of letters and numbers.
In order to look at all the hundreds of subdivisions available within the system,
visit the Library of Congress' classification outline
and then click on one of the 21 letters.
However, just to get an overview of the main divisions plus a few subdivisions, try the list below:
A General Works
B Philosophy. Religion. Psychology.
B Philosophy (General)
BF Psychology
BL Religion
C Auxiliary Sciences of History
D History (General) and History of Europe
E History: United States
F History: United States Local History
G Geography (General)
GN Anthropology
GV Recreation. Leisure.
H Social Sciences
HA Statistics
HG Finance
HM Sociology
HQ The Family. Marriage. Women.
HV Social pathology. Social and public welfare. Criminology.
J Political Science
K Law
KBP Islamic Law
KF United States
KZ Law of Nations
L Education
M Music
N Fine Arts
NA Architecture
NB Sculpture
NC Drawing. Design. Illustration.
ND Painting
NK Decorative Arts
P Language and Literature
PB-PM Languages
PN Literature (General)
PR English literature
PS American literature
PZ Fiction and juvenile fiction
Q Science
QA Mathematics
QC Physics
QD Chemistry
QK Botany
QL Zoology
R Medicine
RC Internal medicine
RD Surgery
RK Dentistry
RS Pharmacy
RT Nursing
S Agriculture
SB Plant culture
SF Animal culture
SH Aquaculture
SK Hunting sports
T Technology
TL Motor vehicles. Aeronautics. Astronautics.
TR Photography
TT Handicrafts. Arts and crafts.
TX Home economics.
U Military Science
V Naval Science
Z Bibliography. Library Science. Information Resources (General)
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