Classification
600 - Technology
363 - Other social problems & services
5
610 - Medicine & health
5
000 - Computer science, information & general works
3
320 - Political science
3
620 - Engineering & allied operations
3
330 - Economics
2
333 - Economics of land & energy
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
900 - History & geography
2
300 - Social sciences
1
304 - Factors affecting social behavior
1
380 - Commerce, communications & transportation
1
400 - Language
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1
658 - General management
1
700 - The arts; fine & decorative arts
1