Classification
414 - Phonology & phonetics
400 - Language
121
410 - Linguistics
90
900 - History & geography
28
380 - Commerce, communications & transportation
15
700 - The arts; fine & decorative arts
14
370 - Education
10
100 - Philosophy & psychology
9
000 - Computer science, information & general works
8
333 - Economics of land & energy
7
491 - East Indo-European & Celtic languages
7
340 - Law
5
576 - Genetics & evolution
4
140 - Specific philosophical schools
3
600 - Technology
3
800 - Literature & rhetoric
3
320 - Political science
2
620 - Engineering & allied operations
2
720 - Architecture
2
780 - Music
2
170 - Ethics
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
330 - Economics
1
363 - Other social problems & services
1
480 - Hellenic languages; classical Greek
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1