A = A - General Works
B = B - Philosophy, Psychology, Religion
C = C - Historical Sciences
D = D - World History
E = E - United States History
F = F - General American History
G = G - Geography, Anthropology, Recreation
H = H - Social Science
J = J - Political Science
K = K - Law
L = L - Education
M = M - Music
N = N - Fine Arts
P = P - Language and Literature
Q = Q - Science
R = R - Medicine
S = S - Agriculture
T = T - Technology
U = U - Military Science
V = V - Naval Science
Z = Z - Library Science