Classification
800 - Literature & rhetoric
900 - History & geography
6
333 - Economics of land & energy
5
600 - Technology
5
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
363 - Other social problems & services
2
370 - Education
2
400 - Language
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
320 - Political science
1
330 - Economics
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1