Classification
300 - Social sciences
320 - Political science
330 - Economics
78
630 - Agriculture & related technologies
15
900 - History & geography
13
700 - The arts; fine & decorative arts
10
100 - Philosophy & psychology
9
340 - Law
9
140 - Specific philosophical schools
6
610 - Medicine & health
6
170 - Ethics
5
301 - Sociology & anthropology
5
200 - Religion
4
363 - Other social problems & services
4
370 - Education
3
600 - Technology
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
400 - Language
2
581 - Specific topics in natural history
2
120 - Epistemology, causation & humankind
1
338 - Production
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
658 - General management
1
720 - Architecture
1