Classification
170 - Ethics
370 - Education
380 - Commerce, communications & transportation
600 - Technology
610 - Medicine & health
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
2
100 - Philosophy & psychology
1
200 - Religion
1
320 - Political science
1
330 - Economics
1
361 - Social problems & social welfare in general
1
400 - Language
1
580 - Plants (Botany)
1
700 - The arts; fine & decorative arts
1