Library of Congress classification groups together works on the same subject. Click on a classification letter to see more detail (PR is for English literature, PS is for American literature, etc.)
A General works
B Philosophy, psychology, religion
C Auxiliary sciences of history
D World history and history of Europe, Asia, Africa, Austalia, New Zealand, etc.
E History of the Americas
F History of the Americas
G Geography, anthropology, recreation
H Social sciences
J Political science
K Law
L Education
M Music and books on music
N Fine arts
P Language and literature
Q Science
R Medicine
S Agriculture
T Technology
U Military science
V Naval science
Z Bibliography, library science, information resources (general)