Classification
170 - Ethics
630 - Agriculture & related technologies
11
320 - Political science
8
620 - Engineering & allied operations
8
100 - Philosophy & psychology
7
140 - Specific philosophical schools
6
363 - Other social problems & services
6
600 - Technology
6
610 - Medicine & health
6
300 - Social sciences
5
700 - The arts; fine & decorative arts
5
340 - Law
4
330 - Economics
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
800 - Literature & rhetoric
3
900 - History & geography
3
000 - Computer science, information & general works
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
720 - Architecture
2
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
658 - General management
1