Classification
301 - Sociology & anthropology
340 - Law
300 - Social sciences
21
900 - History & geography
19
320 - Political science
16
140 - Specific philosophical schools
14
330 - Economics
11
100 - Philosophy & psychology
10
200 - Religion
8
610 - Medicine & health
8
333 - Economics of land & energy
7
170 - Ethics
6
700 - The arts; fine & decorative arts
6
304 - Factors affecting social behavior
5
370 - Education
5
600 - Technology
5
000 - Computer science, information & general works
4
363 - Other social problems & services
4
364 - Criminology
4
400 - Language
4
410 - Linguistics
3
800 - Literature & rhetoric
3
380 - Commerce, communications & transportation
2
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
398 - Folklore
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
720 - Architecture
1
780 - Music
1