Classification
540 - Chemistry & allied sciences
610 - Medicine & health
000 - Computer science, information & general works
35
700 - The arts; fine & decorative arts
33
333 - Economics of land & energy
20
363 - Other social problems & services
17
580 - Plants (Botany)
16
600 - Technology
11
620 - Engineering & allied operations
11
140 - Specific philosophical schools
10
612 - Human physiology
8
615 - Pharmacology & therapeutics
8
380 - Commerce, communications & transportation
7
576 - Genetics & evolution
6
304 - Factors affecting social behavior
5
330 - Economics
5
581 - Specific topics in natural history
5
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
630 - Agriculture & related technologies
4
900 - History & geography
4
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
800 - Literature & rhetoric
2
320 - Political science
1
370 - Education
1
590 - Animals (Zoology)
1