Classification
100 - Philosophy & psychology
610 - Medicine & health
7
320 - Political science
6
370 - Education
6
700 - The arts; fine & decorative arts
6
330 - Economics
5
363 - Other social problems & services
5
170 - Ethics
3
200 - Religion
3
300 - Social sciences
3
361 - Social problems & social welfare in general
3
900 - History & geography
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
600 - Technology
2
620 - Engineering & allied operations
2
780 - Music
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
658 - General management
1