Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
7
580 - Plants (Botany)
6
610 - Medicine & health
6
333 - Economics of land & energy
5
576 - Genetics & evolution
5
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
300 - Social sciences
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
612 - Human physiology
3
600 - Technology
2
320 - Political science
1
330 - Economics
1
340 - Law
1
400 - Language
1
658 - General management
1