Classification
301 - Sociology & anthropology
320 - Political science
330 - Economics
900 - History & geography
300 - Social sciences
12
363 - Other social problems & services
7
100 - Philosophy & psychology
6
340 - Law
6
700 - The arts; fine & decorative arts
6
333 - Economics of land & energy
5
140 - Specific philosophical schools
4
600 - Technology
4
000 - Computer science, information & general works
3
200 - Religion
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
304 - Factors affecting social behavior
2
370 - Education
2
400 - Language
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
410 - Linguistics
1
530 - Physics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1