Classification
333 - Economics of land & energy
4
380 - Commerce, communications & transportation
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
800 - Literature & rhetoric
900 - History & geography
363 - Other social problems & services
3
576 - Genetics & evolution
3
720 - Architecture
3
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
330 - Economics
2
340 - Law
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
370 - Education
1
658 - General management
1