Classification
800 - Literature & rhetoric
900 - History & geography
20
700 - The arts; fine & decorative arts
6
100 - Philosophy & psychology
5
400 - Language
4
300 - Social sciences
3
200 - Religion
2
320 - Political science
2
330 - Economics
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
170 - Ethics
1
301 - Sociology & anthropology
1
398 - Folklore
1
581 - Specific topics in natural history
1
600 - Technology
1