Classification
000 - Computer science, information & general works
333 - Economics of land & energy
10
700 - The arts; fine & decorative arts
9
600 - Technology
8
620 - Engineering & allied operations
8
580 - Plants (Botany)
6
540 - Chemistry & allied sciences
5
610 - Medicine & health
5
414 - Phonology & phonetics
4
900 - History & geography
4
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
330 - Economics
2
500 - Natural sciences & mathematics
2
530 - Physics
2
612 - Human physiology
2
304 - Factors affecting social behavior
1
581 - Specific topics in natural history
1
720 - Architecture
1