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