Classification
100 - Philosophy & psychology
363 - Other social problems & services
581 - Specific topics in natural history
330 - Economics
6
140 - Specific philosophical schools
5
200 - Religion
5
333 - Economics of land & energy
5
700 - The arts; fine & decorative arts
5
900 - History & geography
5
320 - Political science
4
170 - Ethics
3
000 - Computer science, information & general works
2
300 - Social sciences
2
301 - Sociology & anthropology
2
340 - Law
2
500 - Natural sciences & mathematics
2
530 - Physics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1