Classification
320 - Political science
41
300 - Social sciences
19
900 - History & geography
15
600 - Technology
11
610 - Medicine & health
11
140 - Specific philosophical schools
10
100 - Philosophy & psychology
9
170 - Ethics
7
700 - The arts; fine & decorative arts
5
120 - Epistemology, causation & humankind
3
333 - Economics of land & energy
3
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
301 - Sociology & anthropology
2
306 - Culture & institutions
2
340 - Law
2
380 - Commerce, communications & transportation
2
720 - Architecture
2
920 - Biography, genealogy & insignia
2
200 - Religion
1
304 - Factors affecting social behavior
1
346 - Private law
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
576 - Genetics & evolution
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
1
780 - Music
1
820 - English & Old English literatures
1
860 - Spanish & Portuguese literatures
1