Classification
100 - Philosophy & psychology
520 - Astronomy & allied sciences
530 - Physics
4
900 - History & geography
4
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
120 - Epistemology, causation & humankind
2
170 - Ethics
2
200 - Religion
2
301 - Sociology & anthropology
2
320 - Political science
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
140 - Specific philosophical schools
1
160 - Logic
1
300 - Social sciences
1
370 - Education
1
400 - Language
1
610 - Medicine & health
1
800 - Literature & rhetoric
1