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