Classification
120 - Epistemology, causation & humankind
170 - Ethics
100 - Philosophy & psychology
25
140 - Specific philosophical schools
12
200 - Religion
9
530 - Physics
9
900 - History & geography
7
320 - Political science
6
700 - The arts; fine & decorative arts
6
340 - Law
4
400 - Language
4
000 - Computer science, information & general works
3
500 - Natural sciences & mathematics
3
333 - Economics of land & energy
2
410 - Linguistics
2
580 - Plants (Botany)
2
600 - Technology
2
800 - Literature & rhetoric
2
160 - Logic
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
370 - Education
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