Classification
140 - Specific philosophical schools
301 - Sociology & anthropology
600 - Technology
700 - The arts; fine & decorative arts
200 - Religion
3
320 - Political science
3
900 - History & geography
3
000 - Computer science, information & general works
2
363 - Other social problems & services
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
330 - Economics
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1