Classification
140 - Specific philosophical schools
304 - Factors affecting social behavior
330 - Economics
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
10
610 - Medicine & health
10
320 - Political science
9
363 - Other social problems & services
6
000 - Computer science, information & general works
5
300 - Social sciences
5
800 - Literature & rhetoric
5
340 - Law
4
380 - Commerce, communications & transportation
4
100 - Philosophy & psychology
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
600 - Technology
3
900 - History & geography
3
170 - Ethics
2
301 - Sociology & anthropology
2
370 - Education
2
400 - Language
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1