Classification
170 - Ethics
200 - Religion
3
320 - Political science
2
900 - History & geography
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
301 - Sociology & anthropology
1
330 - Economics
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1