Classification
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
301 - Sociology & anthropology
1
320 - Political science
1
330 - Economics
1
340 - Law
1
370 - Education
1
576 - Genetics & evolution
1
600 - Technology
1
620 - Engineering & allied operations
1
900 - History & geography
1