Classification
000 - Computer science, information & general works
8
580 - Plants (Botany)
7
700 - The arts; fine & decorative arts
7
540 - Chemistry & allied sciences
6
610 - Medicine & health
6
600 - Technology
5
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
363 - Other social problems & services
2
576 - Genetics & evolution
2
900 - History & geography
2
330 - Economics
1
333 - Economics of land & energy
1
547 - Organic chemistry
1
579 - Microorganisms, fungi & algae
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
660 - Chemical engineering
1