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