Classification
360 - Social problems & services; associations
361 - Social problems & social welfare in general
102
300 - Social sciences
49
364 - Criminology
49
320 - Political science
32
330 - Economics
21
610 - Medicine & health
16
370 - Education
13
340 - Law
12
900 - History & geography
11
100 - Philosophy & psychology
10
700 - The arts; fine & decorative arts
9
600 - Technology
8
000 - Computer science, information & general works
7
140 - Specific philosophical schools
6
301 - Sociology & anthropology
6
170 - Ethics
5
333 - Economics of land & energy
5
304 - Factors affecting social behavior
4
363 - Other social problems & services
4
551 - Geology, hydrology & meteorology
4
620 - Engineering & allied operations
4
200 - Religion
3
380 - Commerce, communications & transportation
2
400 - Language
2
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
780 - Music
1