Classification
140 - Specific philosophical schools
170 - Ethics
320 - Political science
900 - History & geography
100 - Philosophy & psychology
4
330 - Economics
3
700 - The arts; fine & decorative arts
3
300 - Social sciences
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
340 - Law
2
600 - Technology
2
800 - Literature & rhetoric
2
200 - Religion
1
361 - Social problems & social welfare in general
1
370 - Education
1
520 - Astronomy & allied sciences
1
620 - Engineering & allied operations
1