Classification
140 - Specific philosophical schools
200 - Religion
320 - Political science
900 - History & geography
700 - The arts; fine & decorative arts
8
800 - Literature & rhetoric
7
100 - Philosophy & psychology
6
300 - Social sciences
5
301 - Sociology & anthropology
4
330 - Economics
4
170 - Ethics
3
370 - Education
3
380 - Commerce, communications & transportation
3
410 - Linguistics
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
400 - Language
2
581 - Specific topics in natural history
2
600 - Technology
2
780 - Music
2
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
720 - Architecture
1
901 - Philosophy & theory
1