Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
600 - Technology
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
4
720 - Architecture
900 - History & geography
4
140 - Specific philosophical schools
3
320 - Political science
3
340 - Law
3
576 - Genetics & evolution
3
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
333 - Economics of land & energy
1
800 - Literature & rhetoric
1