Classification
320 - Political science
410 - Linguistics
400 - Language
30
900 - History & geography
29
100 - Philosophy & psychology
14
700 - The arts; fine & decorative arts
14
330 - Economics
10
380 - Commerce, communications & transportation
10
800 - Literature & rhetoric
10
300 - Social sciences
9
333 - Economics of land & energy
7
780 - Music
7
200 - Religion
6
340 - Law
6
370 - Education
6
140 - Specific philosophical schools
5
363 - Other social problems & services
5
600 - Technology
5
000 - Computer science, information & general works
4
301 - Sociology & anthropology
4
610 - Medicine & health
4
170 - Ethics
3
620 - Engineering & allied operations
3
576 - Genetics & evolution
2
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
630 - Agriculture & related technologies
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
791 - Public performances
1
808 - Rhetoric & collections of literature
1
835 - German speeches
1