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