Classification
120 - Epistemology, causation & humankind
170 - Ethics
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
5
140 - Specific philosophical schools
5
200 - Religion
4
530 - Physics
4
340 - Law
3
320 - Political science
2
580 - Plants (Botany)
2
600 - Technology
2
000 - Computer science, information & general works
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1