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