Classification
170 - Ethics
600 - Technology
610 - Medicine & health
000 - Computer science, information & general works
1
001 - Knowledge
1
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
660 - Chemical engineering
1