Classification
600 - Technology
6
620 - Engineering & allied operations
800 - Literature & rhetoric
330 - Economics
5
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
900 - History & geography
3
000 - Computer science, information & general works
2
610 - Medicine & health
2
658 - General management
2
720 - Architecture
2
140 - Specific philosophical schools
1
160 - Logic
1
320 - Political science
1
370 - Education
1
576 - Genetics & evolution
1