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