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