Classification
140 - Specific philosophical schools
300 - Social sciences
700 - The arts; fine & decorative arts
14
363 - Other social problems & services
12
330 - Economics
10
320 - Political science
9
333 - Economics of land & energy
9
900 - History & geography
6
340 - Law
5
600 - Technology
5
620 - Engineering & allied operations
5
000 - Computer science, information & general works
4
301 - Sociology & anthropology
3
380 - Commerce, communications & transportation
3
630 - Agriculture & related technologies
3
720 - Architecture
3
800 - Literature & rhetoric
3
170 - Ethics
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
120 - Epistemology, causation & humankind
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1