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