Classification
100 - Philosophy & psychology
4
120 - Epistemology, causation & humankind
530 - Physics
500 - Natural sciences & mathematics
3
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
160 - Logic
1
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
1
340 - Law
1
400 - Language
1
576 - Genetics & evolution
1
600 - Technology
1
900 - History & geography
1