Classification
333 - Economics of land & energy
3
370 - Education
400 - Language
3
580 - Plants (Botany)
330 - Economics
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
363 - Other social problems & services
1
576 - Genetics & evolution
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
800 - Literature & rhetoric
1
900 - History & geography
1