Classification
100 - Philosophy & psychology
5
140 - Specific philosophical schools
170 - Ethics
300 - Social sciences
320 - Political science
330 - Economics
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
200 - Religion
2
900 - History & geography
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
600 - Technology
1