Classification
320 - Political science
340 - Law
576 - Genetics & evolution
330 - Economics
189
900 - History & geography
189
300 - Social sciences
61
600 - Technology
7
700 - The arts; fine & decorative arts
6
140 - Specific philosophical schools
5
380 - Commerce, communications & transportation
5
620 - Engineering & allied operations
5
363 - Other social problems & services
4
500 - Natural sciences & mathematics
4
100 - Philosophy & psychology
3
720 - Architecture
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
200 - Religion
1
301 - Sociology & anthropology
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
791 - Public performances
1
800 - Literature & rhetoric
1