Classification
300 - Social sciences
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
330 - Economics
7
620 - Engineering & allied operations
6
100 - Philosophy & psychology
5
630 - Agriculture & related technologies
4
780 - Music
4
000 - Computer science, information & general works
3
370 - Education
3
400 - Language
3
720 - Architecture
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
770 - Photography, photographs & computer art
2
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
658 - General management
1