Classification
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
170 - Ethics
1
300 - Social sciences
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
1
320 - Political science
3
330 - Economics
4
333 - Economics of land & energy
1
340 - Law
363 - Other social problems & services
1
370 - Education
380 - Commerce, communications & transportation
1
400 - Language
2
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
600 - Technology
620 - Engineering & allied operations
3
658 - General management
1
700 - The arts; fine & decorative arts
2
780 - Music
1
900 - History & geography
3