Classification
120 - Epistemology, causation & humankind
600 - Technology
100 - Philosophy & psychology
11
300 - Social sciences
8
900 - History & geography
7
320 - Political science
6
140 - Specific philosophical schools
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
620 - Engineering & allied operations
4
170 - Ethics
3
333 - Economics of land & energy
3
370 - Education
3
530 - Physics
3
160 - Logic
2
200 - Religion
2
340 - Law
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
657 - Accounting
1
720 - Architecture
1
800 - Literature & rhetoric
1