Classification
000 - Computer science, information & general works
3
120 - Epistemology, causation & humankind
333 - Economics of land & energy
500 - Natural sciences & mathematics
3
100 - Philosophy & psychology
2
620 - Engineering & allied operations
2
140 - Specific philosophical schools
1
170 - Ethics
1
300 - Social sciences
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
800 - Literature & rhetoric
1
900 - History & geography
1