Classification
414 - Phonology & phonetics
600 - Technology
58
700 - The arts; fine & decorative arts
55
620 - Engineering & allied operations
44
333 - Economics of land & energy
34
900 - History & geography
30
000 - Computer science, information & general works
21
610 - Medicine & health
20
363 - Other social problems & services
17
580 - Plants (Botany)
15
540 - Chemistry & allied sciences
9
576 - Genetics & evolution
9
330 - Economics
8
140 - Specific philosophical schools
7
340 - Law
6
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
4
530 - Physics
4
304 - Factors affecting social behavior
3
800 - Literature & rhetoric
3
400 - Language
2
370 - Education
1
410 - Linguistics
1
550 - Earth sciences
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1
720 - Architecture
1