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