Classification
320 - Political science
536
330 - Economics
520
380 - Commerce, communications & transportation
309
900 - History & geography
55
340 - Law
37
300 - Social sciences
26
820 - English & Old English literatures
14
800 - Literature & rhetoric
13
280 - Christian denominations & sects
6
700 - The arts; fine & decorative arts
6
306 - Culture & institutions
5
360 - Social problems & services; associations
5
576 - Genetics & evolution
5
140 - Specific philosophical schools
4
200 - Religion
4
230 - Christianity & Christian theology
4
940 - History of Europe
4
970 - History of North America
4
150 - Psychology
3
250 - Christian orders & local church
3
301 - Sociology & anthropology
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
170 - Ethics
1
240 - Christian moral & devotional theology
1
270 - History of Christianity & Christian church
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
326 - Slavery & emancipation
1
333 - Economics of land & energy
1
342 - Constitutional & administrative law
1
362 - Social welfare problems & services
1
363 - Other social problems & services
1
400 - Language
1
520 - Astronomy & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
1
640 - Home & family management
1
810 - American literature in English
1