Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
170 - Ethics
900 - History & geography
140 - Specific philosophical schools
4
200 - Religion
3
000 - Computer science, information & general works
2
160 - Logic
2
410 - Linguistics
2
530 - Physics
2
800 - Literature & rhetoric
2
300 - Social sciences
1
320 - Political science
1
340 - Law
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
580 - Plants (Botany)
1