Classification
000 - Computer science, information & general works
4
140 - Specific philosophical schools
1
320 - Political science
330 - Economics
333 - Economics of land & energy
8
360 - Social problems & services; associations
1
363 - Other social problems & services
370 - Education
4
380 - Commerce, communications & transportation
4
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
3
581 - Specific topics in natural history
1
600 - Technology
610 - Medicine & health
3
620 - Engineering & allied operations
8
658 - General management
2
700 - The arts; fine & decorative arts
720 - Architecture
3
900 - History & geography