Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
720 - Architecture
2
900 - History & geography
2
304 - Factors affecting social behavior
1
340 - Law
1
400 - Language
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1