Classification
100 - Philosophy & psychology
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
720 - Architecture
900 - History & geography
000 - Computer science, information & general works
2
300 - Social sciences
2
330 - Economics
2
620 - Engineering & allied operations
2
770 - Photography, photographs & computer art
2
780 - Music
2
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
410 - Linguistics
1
530 - Physics
1
630 - Agriculture & related technologies
1