Classification
160 - Logic
600 - Technology
330 - Economics
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
900 - History & geography
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
500 - Natural sciences & mathematics
3
620 - Engineering & allied operations
3
120 - Epistemology, causation & humankind
2
140 - Specific philosophical schools
2
300 - Social sciences
2
320 - Political science
2
363 - Other social problems & services
2
410 - Linguistics
2
530 - Physics
2
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
576 - Genetics & evolution
1
658 - General management
1
720 - Architecture
1
800 - Literature & rhetoric
1