Classification
400 - Language
600 - Technology
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
34
620 - Engineering & allied operations
27
900 - History & geography
19
330 - Economics
17
140 - Specific philosophical schools
15
333 - Economics of land & energy
15
380 - Commerce, communications & transportation
15
410 - Linguistics
14
370 - Education
13
610 - Medicine & health
13
363 - Other social problems & services
12
100 - Philosophy & psychology
7
300 - Social sciences
7
576 - Genetics & evolution
7
630 - Agriculture & related technologies
7
720 - Architecture
7
320 - Political science
6
500 - Natural sciences & mathematics
6
580 - Plants (Botany)
6
340 - Law
4
540 - Chemistry & allied sciences
3
658 - General management
3
780 - Music
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
160 - Logic
1
301 - Sociology & anthropology
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1