Classification
300 - Social sciences
301 - Sociology & anthropology
900 - History & geography
320 - Political science
17
100 - Philosophy & psychology
14
700 - The arts; fine & decorative arts
10
200 - Religion
7
140 - Specific philosophical schools
6
330 - Economics
6
340 - Law
6
363 - Other social problems & services
4
370 - Education
4
610 - Medicine & health
4
800 - Literature & rhetoric
4
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
410 - Linguistics
3
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
304 - Factors affecting social behavior
2
400 - Language
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
600 - Technology
2
620 - Engineering & allied operations
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
364 - Criminology
1
530 - Physics
1
780 - Music
1