Classification
120 - Epistemology, causation & humankind
610 - Medicine & health
100 - Philosophy & psychology
3
320 - Political science
3
333 - Economics of land & energy
3
900 - History & geography
3
350 - Public administration & military science
2
551 - Geology, hydrology & meteorology
2
140 - Specific philosophical schools
1
170 - Ethics
1
370 - Education
1
400 - Language
1
520 - Astronomy & allied sciences
1
530 - Physics
1
600 - Technology
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1