Classification
380 - Commerce, communications & transportation
000 - Computer science, information & general works
9
333 - Economics of land & energy
6
576 - Genetics & evolution
5
700 - The arts; fine & decorative arts
5
330 - Economics
4
363 - Other social problems & services
4
304 - Factors affecting social behavior
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
800 - Literature & rhetoric
3
900 - History & geography
3
140 - Specific philosophical schools
2
320 - Political science
2
600 - Technology
2
610 - Medicine & health
2
364 - Criminology
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
657 - Accounting
1
720 - Architecture
1