Classification
301 - Sociology & anthropology
600 - Technology
300 - Social sciences
5
620 - Engineering & allied operations
4
320 - Political science
3
363 - Other social problems & services
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
610 - Medicine & health
2
900 - History & geography
2
170 - Ethics
1
333 - Economics of land & energy
1
370 - Education
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1