Classification
300 - Social sciences
320 - Political science
330 - Economics
780 - Music
100 - Philosophy & psychology
7
900 - History & geography
7
600 - Technology
6
700 - The arts; fine & decorative arts
5
400 - Language
4
410 - Linguistics
4
620 - Engineering & allied operations
4
370 - Education
3
380 - Commerce, communications & transportation
3
000 - Computer science, information & general works
2
530 - Physics
2
630 - Agriculture & related technologies
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
340 - Law
1
610 - Medicine & health
1
658 - General management
1
800 - Literature & rhetoric
1