Classification
140 - Specific philosophical schools
170 - Ethics
330 - Economics
333 - Economics of land & energy
12
100 - Philosophy & psychology
10
320 - Political science
8
300 - Social sciences
7
200 - Religion
6
363 - Other social problems & services
6
600 - Technology
6
700 - The arts; fine & decorative arts
6
900 - History & geography
5
000 - Computer science, information & general works
4
301 - Sociology & anthropology
3
370 - Education
3
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
304 - Factors affecting social behavior
2
340 - Law
2
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
658 - General management
2
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1