Classification
300 - Social sciences
610 - Medicine & health
630 - Agriculture & related technologies
320 - Political science
4
363 - Other social problems & services
4
600 - Technology
4
620 - Engineering & allied operations
4
170 - Ethics
3
333 - Economics of land & energy
3
700 - The arts; fine & decorative arts
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
330 - Economics
2
340 - Law
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
720 - Architecture
2
800 - Literature & rhetoric
2
900 - History & geography
2
301 - Sociology & anthropology
1
540 - Chemistry & allied sciences
1