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