Classification
363 - Other social problems & services
414 - Phonology & phonetics
620 - Engineering & allied operations
580 - Plants (Botany)
9
700 - The arts; fine & decorative arts
9
333 - Economics of land & energy
8
600 - Technology
7
576 - Genetics & evolution
6
000 - Computer science, information & general works
4
380 - Commerce, communications & transportation
4
610 - Medicine & health
4
900 - History & geography
4
140 - Specific philosophical schools
3
300 - Social sciences
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
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1