Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
170 - Ethics
500 - Natural sciences & mathematics
530 - Physics
3
140 - Specific philosophical schools
2
000 - Computer science, information & general works
1
160 - Logic
1
200 - Religion
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1