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