Classification
551 - Geology, hydrology & meteorology
580 - Plants (Botany)
4
600 - Technology
363 - Other social problems & services
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
000 - Computer science, information & general works
2
612 - Human physiology
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
720 - Architecture
1