Classification
330 - Economics
333 - Economics of land & energy
8
363 - Other social problems & services
8
370 - Education
551 - Geology, hydrology & meteorology
320 - Political science
7
000 - Computer science, information & general works
5
380 - Commerce, communications & transportation
5
600 - Technology
5
700 - The arts; fine & decorative arts
5
610 - Medicine & health
4
140 - Specific philosophical schools
3
658 - General management
3
720 - Architecture
3
900 - History & geography
3
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1