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