Classification
630 - Agriculture & related technologies
000 - Computer science, information & general works
8
600 - Technology
7
620 - Engineering & allied operations
7
580 - Plants (Botany)
6
363 - Other social problems & services
4
610 - Medicine & health
4
330 - Economics
3
333 - Economics of land & energy
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
380 - Commerce, communications & transportation
2
612 - Human physiology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
370 - Education
1
414 - Phonology & phonetics
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1