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