Classification
363 - Other social problems & services
551 - Geology, hydrology & meteorology
580 - Plants (Botany)
600 - Technology
610 - Medicine & health
630 - Agriculture & related technologies
5
000 - Computer science, information & general works
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
3
330 - Economics
2
333 - Economics of land & energy
2
100 - Philosophy & psychology
1
320 - Political science
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
612 - Human physiology
1