Classification
140 - Specific philosophical schools
540 - Chemistry & allied sciences
610 - Medicine & health
000 - Computer science, information & general works
27
700 - The arts; fine & decorative arts
23
333 - Economics of land & energy
19
363 - Other social problems & services
13
580 - Plants (Botany)
13
620 - Engineering & allied operations
10
380 - Commerce, communications & transportation
9
600 - Technology
9
612 - Human physiology
7
304 - Factors affecting social behavior
6
330 - Economics
5
500 - Natural sciences & mathematics
5
551 - Geology, hydrology & meteorology
5
414 - Phonology & phonetics
4
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
300 - Social sciences
3
615 - Pharmacology & therapeutics
3
320 - Political science
2
340 - Law
2
900 - History & geography
2
170 - Ethics
1
400 - Language
1
530 - Physics
1
630 - Agriculture & related technologies
1