Classification
540 - Chemistry & allied sciences
610 - Medicine & health
000 - Computer science, information & general works
102
700 - The arts; fine & decorative arts
96
333 - Economics of land & energy
56
140 - Specific philosophical schools
44
580 - Plants (Botany)
44
363 - Other social problems & services
40
600 - Technology
31
620 - Engineering & allied operations
26
380 - Commerce, communications & transportation
20
615 - Pharmacology & therapeutics
19
330 - Economics
17
612 - Human physiology
15
304 - Factors affecting social behavior
12
576 - Genetics & evolution
12
900 - History & geography
9
414 - Phonology & phonetics
8
581 - Specific topics in natural history
8
500 - Natural sciences & mathematics
7
551 - Geology, hydrology & meteorology
7
630 - Agriculture & related technologies
7
300 - Social sciences
4
370 - Education
4
320 - Political science
3
530 - Physics
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
340 - Law
1
361 - Social problems & social welfare in general
1
400 - Language
1
590 - Animals (Zoology)
1
720 - Architecture
1