BX - Christian Denominations 393,122
B - Philosophy 281,257
BP - Islam, Bahaism, Theosophy 193,351
BS - The Bible 189,181
BL - Religions, Mythology, Rationalism 182,021
BF - Psychology 174,151
BV - Practical Theology 166,347
BR - Christianity 139,161
BM - Judaism 138,379
BT - Doctrinal Theology 113,714
BQ - Buddhism 87,217
BJ - Ethics 61,536
BD - Speculative Philosophy 46,268
BH - Aesthetics 15,388
BC - Logic 12,051
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