Classification
320 - Political science
3
370 - Education
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
900 - History & geography
000 - Computer science, information & general works
2
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
600 - Technology
2
720 - Architecture
2
360 - Social problems & services; associations
1
400 - Language
1