Classification
140 - Specific philosophical schools
330 - Economics
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
9
363 - Other social problems & services
6
600 - Technology
6
610 - Medicine & health
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
5
551 - Geology, hydrology & meteorology
4
304 - Factors affecting social behavior
3
320 - Political science
3
400 - Language
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
370 - Education
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
900 - History & geography
1