Classification
301 - Sociology & anthropology
900 - History & geography
22
300 - Social sciences
18
320 - Political science
16
140 - Specific philosophical schools
10
700 - The arts; fine & decorative arts
10
330 - Economics
9
340 - Law
7
304 - Factors affecting social behavior
6
361 - Social problems & social welfare in general
6
610 - Medicine & health
6
780 - Music
6
363 - Other social problems & services
5
170 - Ethics
4
200 - Religion
4
600 - Technology
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
360 - Social problems & services; associations
1
364 - Criminology
1
370 - Education
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
720 - Architecture
1