Classification
000 - Computer science, information & general works
363 - Other social problems & services
576 - Genetics & evolution
320 - Political science
5
333 - Economics of land & energy
5
330 - Economics
4
551 - Geology, hydrology & meteorology
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
380 - Commerce, communications & transportation
2
600 - Technology
2
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1