Classification
000 - Computer science, information & general works
100 - Philosophy & psychology
7
140 - Specific philosophical schools
200 - Religion
170 - Ethics
5
320 - Political science
4
900 - History & geography
4
120 - Epistemology, causation & humankind
3
300 - Social sciences
3
301 - Sociology & anthropology
2
330 - Economics
2
333 - Economics of land & energy
2
410 - Linguistics
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
2
363 - Other social problems & services
1
530 - Physics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1