Classification
100 - Philosophy & psychology
120 - Epistemology, causation & humankind
520 - Astronomy & allied sciences
900 - History & geography
2
160 - Logic
1
170 - Ethics
1
333 - Economics of land & energy
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
530 - Physics
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1