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