Classification
300 - Social sciences
370 - Education
400 - Language
100 - Philosophy & psychology
9
410 - Linguistics
9
900 - History & geography
9
380 - Commerce, communications & transportation
8
600 - Technology
7
330 - Economics
6
700 - The arts; fine & decorative arts
6
320 - Political science
5
333 - Economics of land & energy
5
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
301 - Sociology & anthropology
4
340 - Law
4
610 - Medicine & health
4
000 - Computer science, information & general works
3
780 - Music
3
304 - Factors affecting social behavior
2
363 - Other social problems & services
2
500 - Natural sciences & mathematics
2
630 - Agriculture & related technologies
2
658 - General management
2
800 - Literature & rhetoric
2
200 - Religion
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
770 - Photography, photographs & computer art
1