Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
363 - Other social problems & services
700 - The arts; fine & decorative arts
333 - Economics of land & energy
4
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
170 - Ethics
2
200 - Religion
2
581 - Specific topics in natural history
2
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
400 - Language
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1
900 - History & geography
1