Classification
330 - Economics
551 - Geology, hydrology & meteorology
610 - Medicine & health
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1