BX - Christian Denominations 393,200
B - Philosophy 281,625
BP - Islam, Bahaism, Theosophy 193,534
BS - The Bible 189,271
BL - Religions, Mythology, Rationalism 182,272
BF - Psychology 174,340
BV - Practical Theology 166,372
BR - Christianity 139,222
BM - Judaism 138,486
BT - Doctrinal Theology 113,747
BQ - Buddhism 87,358
BJ - Ethics 61,620
BD - Speculative Philosophy 46,309
BH - Aesthetics 15,414
BC - Logic 12,054
N - Visual Arts 3
E - United States History 2
KF - United States 1
M - Music 1
S - General Agriculture 1
V - General Naval Science 1