Classification
900 - History & geography
800 - Literature & rhetoric
8
780 - Music
3
330 - Economics
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1