Answer:
A = General Works
B = Philosophy, Psychology, Religion
C-D = History and Topography (Except American)
E-F = America
G = Geography, Anthropology, Sports and Games
H = Social Sciences
J = Political Science
K = Law
L = Education
M = Music
N = Fine Arts
P = Language and Literature
Q = Science
R = Medicine
S = Agriculture, Forestry
T = Engineering and Technology
U = Military Science
V = Naval Science
Z = Bibliography
you are very welcome