Classification
100 - Philosophy & psychology
300 - Social sciences
2
301 - Sociology & anthropology
370 - Education
2
400 - Language
410 - Linguistics
2
900 - History & geography
140 - Specific philosophical schools
1
320 - Political science
1
576 - Genetics & evolution
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
780 - Music
1