Classification
000 - Computer science, information & general works
610 - Medicine & health
140 - Specific philosophical schools
9
700 - The arts; fine & decorative arts
8
333 - Economics of land & energy
6
580 - Plants (Botany)
6
363 - Other social problems & services
5
540 - Chemistry & allied sciences
5
600 - Technology
5
576 - Genetics & evolution
3
800 - Literature & rhetoric
3
900 - History & geography
3
304 - Factors affecting social behavior
2
330 - Economics
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
620 - Engineering & allied operations
2
300 - Social sciences
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1
720 - Architecture
1