Classification
300 - Social sciences
320 - Political science
630 - Agriculture & related technologies
720 - Architecture
330 - Economics
3
600 - Technology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
363 - Other social problems & services
1
410 - Linguistics
1
530 - Physics
1
770 - Photography, photographs & computer art
1
780 - Music
1