Classification
330 - Economics
600 - Technology
620 - Engineering & allied operations
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
11
900 - History & geography
9
363 - Other social problems & services
8
333 - Economics of land & energy
7
576 - Genetics & evolution
4
000 - Computer science, information & general works
3
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
658 - General management
3
720 - Architecture
3
140 - Specific philosophical schools
2
580 - Plants (Botany)
2
160 - Logic
1
320 - Political science
1
370 - Education
1
540 - Chemistry & allied sciences
1