Classification
330 - Economics
363 - Other social problems & services
600 - Technology
658 - General management
700 - The arts; fine & decorative arts
333 - Economics of land & energy
11
620 - Engineering & allied operations
9
000 - Computer science, information & general works
8
380 - Commerce, communications & transportation
5
320 - Political science
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
610 - Medicine & health
4
900 - History & geography
4
140 - Specific philosophical schools
3
370 - Education
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
160 - Logic
1
200 - Religion
1
300 - Social sciences
1
540 - Chemistry & allied sciences
1