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