Classification
140 - Specific philosophical schools
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
600 - Technology
6
330 - Economics
5
363 - Other social problems & services
5
333 - Economics of land & energy
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
900 - History & geography
4
000 - Computer science, information & general works
3
340 - Law
3
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
170 - Ethics
2
300 - Social sciences
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
320 - Political science
1
350 - Public administration & military science
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
612 - Human physiology
1