Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
1
320 - Political science
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
900 - History & geography
1