Classification
500 - Natural sciences & mathematics
720 - Architecture
333 - Economics of land & energy
4
600 - Technology
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
330 - Economics
3
100 - Philosophy & psychology
2
300 - Social sciences
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
900 - History & geography
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
320 - Political science
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
658 - General management
1
800 - Literature & rhetoric
1