Classification
100 - Philosophy & psychology
000 - Computer science, information & general works
5
300 - Social sciences
4
600 - Technology
4
140 - Specific philosophical schools
3
170 - Ethics
3
330 - Economics
3
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
400 - Language
2
120 - Epistemology, causation & humankind
1
320 - Political science
1
370 - Education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
658 - General management
1
900 - History & geography
1