Classification
000 - Computer science, information & general works
333 - Economics of land & energy
600 - Technology
9
700 - The arts; fine & decorative arts
720 - Architecture
620 - Engineering & allied operations
7
900 - History & geography
7
330 - Economics
4
576 - Genetics & evolution
4
380 - Commerce, communications & transportation
3
580 - Plants (Botany)
3
610 - Medicine & health
3
320 - Political science
1
363 - Other social problems & services
1
400 - Language
1
630 - Agriculture & related technologies
1