Classification
170 - Ethics
340 - Law
320 - Political science
41
100 - Philosophy & psychology
38
140 - Specific philosophical schools
27
330 - Economics
25
610 - Medicine & health
23
700 - The arts; fine & decorative arts
22
300 - Social sciences
20
600 - Technology
13
900 - History & geography
12
363 - Other social problems & services
11
620 - Engineering & allied operations
10
000 - Computer science, information & general works
8
333 - Economics of land & energy
8
301 - Sociology & anthropology
7
580 - Plants (Botany)
7
200 - Religion
6
370 - Education
6
380 - Commerce, communications & transportation
6
576 - Genetics & evolution
6
800 - Literature & rhetoric
5
120 - Epistemology, causation & humankind
4
361 - Social problems & social welfare in general
4
400 - Language
4
530 - Physics
4
630 - Agriculture & related technologies
4
304 - Factors affecting social behavior
3
364 - Criminology
3
410 - Linguistics
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
720 - Architecture
2
344 - Labor, social, education & cultural law
1
346 - Private law
1
362 - Social welfare problems & services
1
398 - Folklore
1