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