Classification
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
900 - History & geography
333 - Economics of land & energy
6
330 - Economics
3
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
610 - Medicine & health
3
720 - Architecture
3
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
363 - Other social problems & services
2
630 - Agriculture & related technologies
2
540 - Chemistry & allied sciences
1
658 - General management
1