Classification
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
800 - Literature & rhetoric
333 - Economics of land & energy
9
700 - The arts; fine & decorative arts
7
140 - Specific philosophical schools
5
610 - Medicine & health
5
363 - Other social problems & services
4
000 - Computer science, information & general works
3
320 - Political science
3
620 - Engineering & allied operations
3
658 - General management
3
900 - History & geography
3
304 - Factors affecting social behavior
2
400 - Language
2
576 - Genetics & evolution
2
657 - Accounting
2
720 - Architecture
2
336 - Public finance
1
361 - Social problems & social welfare in general
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1