Classification
581 - Specific topics in natural history
580 - Plants (Botany)
11
000 - Computer science, information & general works
8
700 - The arts; fine & decorative arts
8
363 - Other social problems & services
7
610 - Medicine & health
7
576 - Genetics & evolution
6
551 - Geology, hydrology & meteorology
5
140 - Specific philosophical schools
4
333 - Economics of land & energy
4
540 - Chemistry & allied sciences
4
620 - Engineering & allied operations
4
300 - Social sciences
3
380 - Commerce, communications & transportation
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
3
612 - Human physiology
3
600 - Technology
2
900 - History & geography
2
800 - Literature & rhetoric
1