Classification
120 - Epistemology, causation & humankind
170 - Ethics
530 - Physics
100 - Philosophy & psychology
10
140 - Specific philosophical schools
5
200 - Religion
4
700 - The arts; fine & decorative arts
4
320 - Political science
3
340 - Law
3
500 - Natural sciences & mathematics
3
333 - Economics of land & energy
2
400 - Language
2
580 - Plants (Botany)
2
600 - Technology
2
900 - History & geography
2
000 - Computer science, information & general works
1
160 - Logic
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
370 - Education
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1