Classification
140 - Specific philosophical schools
300 - Social sciences
340 - Law
600 - Technology
900 - History & geography
170 - Ethics
3
576 - Genetics & evolution
3
620 - Engineering & allied operations
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
320 - Political science
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
720 - Architecture
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1