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