Classification
170 - Ethics
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
4
320 - Political science
4
340 - Law
3
200 - Religion
2
330 - Economics
2
363 - Other social problems & services
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
900 - History & geography
2
140 - Specific philosophical schools
1
300 - Social sciences
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
581 - Specific topics in natural history
1
600 - Technology
1
630 - Agriculture & related technologies
1
780 - Music
1