Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
370 - Education
320 - Political science
8
333 - Economics of land & energy
8
900 - History & geography
8
700 - The arts; fine & decorative arts
7
300 - Social sciences
6
301 - Sociology & anthropology
5
600 - Technology
5
330 - Economics
3
363 - Other social problems & services
3
576 - Genetics & evolution
3
170 - Ethics
2
200 - Religion
2
340 - Law
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1