Classification
120 - Epistemology, causation & humankind
140 - Specific philosophical schools
1
170 - Ethics
1
304 - Factors affecting social behavior
333 - Economics of land & energy
1
340 - Law
1
370 - Education
1
530 - Physics
1
551 - Geology, hydrology & meteorology
600 - Technology
1
700 - The arts; fine & decorative arts
1