Classification
140 - Specific philosophical schools
200 - Religion
320 - Political science
900 - History & geography
100 - Philosophy & psychology
5
330 - Economics
4
700 - The arts; fine & decorative arts
4
800 - Literature & rhetoric
4
170 - Ethics
3
300 - Social sciences
3
370 - Education
3
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
530 - Physics
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
720 - Architecture
1
901 - Philosophy & theory
1