Classification
100 - Philosophy & psychology
23
900 - History & geography
8
530 - Physics
5
200 - Religion
4
300 - Social sciences
3
120 - Epistemology, causation & humankind
2
140 - Specific philosophical schools
2
170 - Ethics
2
301 - Sociology & anthropology
2
320 - Political science
2
370 - Education
2
576 - Genetics & evolution
2
600 - Technology
2
800 - Literature & rhetoric
2
398 - Folklore
1
400 - Language
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1