Classification
100 - Philosophy & psychology
301 - Sociology & anthropology
320 - Political science
600 - Technology
900 - History & geography
140 - Specific philosophical schools
3
300 - Social sciences
3
370 - Education
3
330 - Economics
2
340 - Law
2
000 - Computer science, information & general works
1
170 - Ethics
1
200 - Religion
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
576 - Genetics & evolution
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1