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