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