Classification
000 - Computer science, information & general works
5
140 - Specific philosophical schools
4
300 - Social sciences
3
304 - Factors affecting social behavior
2
333 - Economics of land & energy
9
363 - Other social problems & services
9
380 - Commerce, communications & transportation
4
414 - Phonology & phonetics
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
4
576 - Genetics & evolution
6
580 - Plants (Botany)
581 - Specific topics in natural history
3
600 - Technology
9
610 - Medicine & health
6
612 - Human physiology
3
620 - Engineering & allied operations
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
720 - Architecture
1
900 - History & geography
5