Classification
000 - Computer science, information & general works
18
700 - The arts; fine & decorative arts
16
610 - Medicine & health
15
580 - Plants (Botany)
13
333 - Economics of land & energy
8
540 - Chemistry & allied sciences
7
140 - Specific philosophical schools
6
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
5
620 - Engineering & allied operations
4
300 - Social sciences
3
330 - Economics
3
414 - Phonology & phonetics
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
600 - Technology
3
612 - Human physiology
3
900 - History & geography
3
800 - Literature & rhetoric
2
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1