Classification
301 - Sociology & anthropology
900 - History & geography
6
300 - Social sciences
5
140 - Specific philosophical schools
4
700 - The arts; fine & decorative arts
4
100 - Philosophy & psychology
3
400 - Language
3
200 - Religion
2
320 - Political science
2
330 - Economics
2
576 - Genetics & evolution
2
780 - Music
2
000 - Computer science, information & general works
1
170 - Ethics
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1