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