Classification
320 - Political science
330 - Economics
1,294
300 - Social sciences
290
900 - History & geography
143
630 - Agriculture & related technologies
128
340 - Law
120
700 - The arts; fine & decorative arts
40
500 - Natural sciences & mathematics
22
100 - Philosophy & psychology
15
170 - Ethics
12
800 - Literature & rhetoric
9
370 - Education
8
200 - Religion
6
140 - Specific philosophical schools
5
600 - Technology
5
550 - Earth sciences
4
610 - Medicine & health
4
160 - Logic
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
2
400 - Language
2
720 - Architecture
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
336 - Public finance
1
345 - Criminal law
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1