Classification
000 - Computer science, information & general works
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
900 - History & geography
2
170 - Ethics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1