Classification
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
61
000 - Computer science, information & general works
56
333 - Economics of land & energy
28
620 - Engineering & allied operations
27
600 - Technology
26
610 - Medicine & health
22
580 - Plants (Botany)
13
363 - Other social problems & services
12
380 - Commerce, communications & transportation
7
900 - History & geography
7
414 - Phonology & phonetics
6
530 - Physics
6
140 - Specific philosophical schools
4
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
720 - Architecture
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
612 - Human physiology
2
630 - Agriculture & related technologies
2
330 - Economics
1
370 - Education
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1