Classification
100 - Philosophy & psychology
300 - Social sciences
320 - Political science
330 - Economics
3
340 - Law
370 - Education
3
600 - Technology
900 - History & geography
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
620 - Engineering & allied operations
2
170 - Ethics
1
304 - Factors affecting social behavior
1
380 - Commerce, communications & transportation
1
400 - Language
1
576 - Genetics & evolution
1
658 - General management
1
700 - The arts; fine & decorative arts
1
780 - Music
1