Classification
100 - Philosophy & psychology
400 - Language
000 - Computer science, information & general works
6
600 - Technology
6
700 - The arts; fine & decorative arts
6
300 - Social sciences
5
380 - Commerce, communications & transportation
4
410 - Linguistics
4
320 - Political science
3
330 - Economics
3
370 - Education
3
900 - History & geography
3
340 - Law
2
530 - Physics
2
576 - Genetics & evolution
2
620 - Engineering & allied operations
2
780 - Music
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
170 - Ethics
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1