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