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