Classification
330 - Economics
363 - Other social problems & services
600 - Technology
6
610 - Medicine & health
620 - Engineering & allied operations
333 - Economics of land & energy
5
900 - History & geography
4
000 - Computer science, information & general works
3
551 - Geology, hydrology & meteorology
3
320 - Political science
2
140 - Specific philosophical schools
1
170 - Ethics
1
360 - Social problems & services; associations
1
370 - Education
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
658 - General management
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1