Classification
140 - Specific philosophical schools
170 - Ethics
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
340 - Law
2
620 - Engineering & allied operations
2
900 - History & geography
2
361 - Social problems & social welfare in general
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1