Classification
600 - Technology
700 - The arts; fine & decorative arts
3
770 - Photography, photographs & computer art
900 - History & geography
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
300 - Social sciences
2
320 - Political science
2
330 - Economics
2
620 - Engineering & allied operations
2
720 - Architecture
2
780 - Music
2
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
530 - Physics
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1