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