Classification
000 - Computer science, information & general works
540 - Chemistry & allied sciences
576 - Genetics & evolution
700 - The arts; fine & decorative arts
19
333 - Economics of land & energy
15
363 - Other social problems & services
9
610 - Medicine & health
9
580 - Plants (Botany)
8
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
620 - Engineering & allied operations
7
414 - Phonology & phonetics
5
500 - Natural sciences & mathematics
5
600 - Technology
5
330 - Economics
4
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
612 - Human physiology
4
300 - Social sciences
3
900 - History & geography
3
304 - Factors affecting social behavior
2
720 - Architecture
2
100 - Philosophy & psychology
1
160 - Logic
1
301 - Sociology & anthropology
1
320 - Political science
1
530 - Physics
1
590 - Animals (Zoology)
1
800 - Literature & rhetoric
1