Classification
120 - Epistemology, causation & humankind
400 - Language
100 - Philosophy & psychology
9
170 - Ethics
4
200 - Religion
3
320 - Political science
3
333 - Economics of land & energy
3
530 - Physics
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
340 - Law
2
370 - Education
2
410 - Linguistics
2
576 - Genetics & evolution
2
800 - Literature & rhetoric
2
900 - History & geography
2
300 - Social sciences
1
301 - Sociology & anthropology
1
330 - Economics
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
610 - Medicine & health
1
620 - Engineering & allied operations
1