Classification
120 - Epistemology, causation & humankind
170 - Ethics
340 - Law
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
530 - Physics
2
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
320 - Political science
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
600 - Technology
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1