Classification
300 - Social sciences
700 - The arts; fine & decorative arts
770 - Photography, photographs & computer art
900 - History & geography
100 - Philosophy & psychology
3
320 - Political science
3
330 - Economics
3
720 - Architecture
3
780 - Music
3
410 - Linguistics
2
600 - Technology
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
340 - Law
1
370 - Education
1
400 - Language
1
530 - Physics
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
800 - Literature & rhetoric
1