Classification
170 - Ethics
340 - Law
100 - Philosophy & psychology
27
140 - Specific philosophical schools
20
320 - Political science
17
200 - Religion
11
700 - The arts; fine & decorative arts
10
300 - Social sciences
9
610 - Medicine & health
9
900 - History & geography
8
600 - Technology
7
333 - Economics of land & energy
6
000 - Computer science, information & general works
5
370 - Education
5
380 - Commerce, communications & transportation
5
620 - Engineering & allied operations
5
120 - Epistemology, causation & humankind
4
363 - Other social problems & services
4
400 - Language
4
576 - Genetics & evolution
4
330 - Economics
3
361 - Social problems & social welfare in general
3
364 - Criminology
3
530 - Physics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
410 - Linguistics
2
580 - Plants (Botany)
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1