Classification
120 - Epistemology, causation & humankind
170 - Ethics
100 - Philosophy & psychology
34
140 - Specific philosophical schools
15
200 - Religion
14
320 - Political science
13
530 - Physics
11
900 - History & geography
10
700 - The arts; fine & decorative arts
8
400 - Language
7
340 - Law
5
000 - Computer science, information & general works
4
500 - Natural sciences & mathematics
4
333 - Economics of land & energy
3
410 - Linguistics
3
580 - Plants (Botany)
3
600 - Technology
3
160 - Logic
2
300 - Social sciences
2
370 - Education
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1