Classification
100 - Philosophy & psychology
330 - Economics
700 - The arts; fine & decorative arts
900 - History & geography
300 - Social sciences
9
600 - Technology
9
320 - Political science
6
370 - Education
6
620 - Engineering & allied operations
6
720 - Architecture
5
770 - Photography, photographs & computer art
5
780 - Music
5
800 - Literature & rhetoric
5
400 - Language
4
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
410 - Linguistics
3
530 - Physics
3
658 - General management
3
140 - Specific philosophical schools
2
340 - Law
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
200 - Religion
1
301 - Sociology & anthropology
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1