Classification
170 - Ethics
600 - Technology
900 - History & geography
620 - Engineering & allied operations
10
140 - Specific philosophical schools
8
320 - Political science
8
610 - Medicine & health
8
700 - The arts; fine & decorative arts
8
300 - Social sciences
7
330 - Economics
7
333 - Economics of land & energy
7
000 - Computer science, information & general works
6
100 - Philosophy & psychology
6
340 - Law
5
720 - Architecture
5
363 - Other social problems & services
4
370 - Education
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
530 - Physics
1