Classification
320 - Political science
330 - Economics
7
363 - Other social problems & services
600 - Technology
658 - General management
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
4
370 - Education
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
900 - History & geography
2
140 - Specific philosophical schools
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
720 - Architecture
1