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