Classification
100 - Philosophy & psychology
300 - Social sciences
301 - Sociology & anthropology
320 - Political science
3
340 - Law
370 - Education
140 - Specific philosophical schools
2
330 - Economics
2
600 - Technology
2
900 - History & geography
2
000 - Computer science, information & general works
1
170 - Ethics
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1