Classification
170 - Ethics
320 - Political science
340 - Law
330 - Economics
28
100 - Philosophy & psychology
22
140 - Specific philosophical schools
11
300 - Social sciences
10
700 - The arts; fine & decorative arts
10
900 - History & geography
7
363 - Other social problems & services
5
200 - Religion
4
380 - Commerce, communications & transportation
4
600 - Technology
4
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
301 - Sociology & anthropology
2
370 - Education
2
581 - Specific topics in natural history
2
658 - General management
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
241 - Christian ethics
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
398 - Folklore
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1