Classification
100 - Philosophy & psychology
300 - Social sciences
410 - Linguistics
780 - Music
900 - History & geography
320 - Political science
4
330 - Economics
4
400 - Language
4
600 - Technology
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
370 - Education
2
380 - Commerce, communications & transportation
2
200 - Religion
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
530 - Physics
1
576 - Genetics & evolution
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1