Classification
361 - Social problems & social welfare in general
380 - Commerce, communications & transportation
320 - Political science
10
330 - Economics
10
333 - Economics of land & energy
9
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
8
600 - Technology
7
140 - Specific philosophical schools
6
363 - Other social problems & services
5
610 - Medicine & health
4
630 - Agriculture & related technologies
4
200 - Religion
3
581 - Specific topics in natural history
3
620 - Engineering & allied operations
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
612 - Human physiology
2
658 - General management
2
900 - History & geography
2
170 - Ethics
1
301 - Sociology & anthropology
1
336 - Public finance
1
370 - Education
1
400 - Language
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1