Classification
900 - History & geography
125
800 - Literature & rhetoric
115
700 - The arts; fine & decorative arts
31
100 - Philosophy & psychology
20
200 - Religion
14
410 - Linguistics
13
400 - Language
12
320 - Political science
10
300 - Social sciences
9
301 - Sociology & anthropology
8
140 - Specific philosophical schools
6
363 - Other social problems & services
4
370 - Education
4
500 - Natural sciences & mathematics
4
780 - Music
4
170 - Ethics
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
720 - Architecture
3
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
2
330 - Economics
2
340 - Law
2
398 - Folklore
2
581 - Specific topics in natural history
2
600 - Technology
2
610 - Medicine & health
2
304 - Factors affecting social behavior
1