Classification
000 - Computer science, information & general works
4
330 - Economics
700 - The arts; fine & decorative arts
4
770 - Photography, photographs & computer art
600 - Technology
3
900 - History & geography
3
140 - Specific philosophical schools
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
780 - Music
2
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
410 - Linguistics
1
530 - Physics
1
580 - Plants (Botany)
1
720 - Architecture
1