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