Classification
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
700 - The arts; fine & decorative arts
363 - Other social problems & services
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
658 - General management
1
900 - History & geography
1