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