Classification
320 - Political science
333 - Economics of land & energy
6
380 - Commerce, communications & transportation
600 - Technology
610 - Medicine & health
900 - History & geography
700 - The arts; fine & decorative arts
5
551 - Geology, hydrology & meteorology
4
620 - Engineering & allied operations
4
720 - Architecture
4
000 - Computer science, information & general works
3
330 - Economics
3
370 - Education
3
363 - Other social problems & services
2
400 - Language
2
300 - Social sciences
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1