Classification
333 - Economics of land & energy
600 - Technology
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
620 - Engineering & allied operations
4
900 - History & geography
4
330 - Economics
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
610 - Medicine & health
2
140 - Specific philosophical schools
1
530 - Physics
1
580 - Plants (Botany)
1
720 - Architecture
1