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