Classification
410 - Linguistics
400 - Language
23
370 - Education
16
700 - The arts; fine & decorative arts
13
100 - Philosophy & psychology
11
900 - History & geography
8
300 - Social sciences
7
333 - Economics of land & energy
7
380 - Commerce, communications & transportation
7
600 - Technology
7
800 - Literature & rhetoric
6
320 - Political science
5
330 - Economics
5
414 - Phonology & phonetics
5
140 - Specific philosophical schools
4
200 - Religion
4
301 - Sociology & anthropology
4
340 - Law
4
000 - Computer science, information & general works
3
363 - Other social problems & services
3
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
658 - General management
2
770 - Photography, photographs & computer art
2
780 - Music
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
304 - Factors affecting social behavior
1
530 - Physics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1