Classification
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
4
700 - The arts; fine & decorative arts
720 - Architecture
900 - History & geography
320 - Political science
3
370 - Education
3
551 - Geology, hydrology & meteorology
3
000 - Computer science, information & general works
2
610 - Medicine & health
2
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
658 - General management
1