Classification
330 - Economics
600 - Technology
620 - Engineering & allied operations
363 - Other social problems & services
8
630 - Agriculture & related technologies
7
333 - Economics of land & energy
5
320 - Political science
4
551 - Geology, hydrology & meteorology
4
140 - Specific philosophical schools
3
610 - Medicine & health
3
550 - Earth sciences
2
900 - History & geography
2
340 - Law
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1