Classification
900 - History & geography
11
300 - Social sciences
10
301 - Sociology & anthropology
7
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
320 - Political science
3
398 - Folklore
3
400 - Language
3
551 - Geology, hydrology & meteorology
3
200 - Religion
2
333 - Economics of land & energy
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
410 - Linguistics
1
610 - Medicine & health
1
800 - Literature & rhetoric
1