Classification
333 - Economics of land & energy
800 - Literature & rhetoric
610 - Medicine & health
6
330 - Economics
4
363 - Other social problems & services
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
304 - Factors affecting social behavior
2
400 - Language
2
414 - Phonology & phonetics
2
580 - Plants (Botany)
2
000 - Computer science, information & general works
1
300 - Social sciences
1
320 - Political science
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
658 - General management
1
720 - Architecture
1
900 - History & geography
1