Classification
580 - Plants (Botany)
610 - Medicine & health
19
700 - The arts; fine & decorative arts
11
000 - Computer science, information & general works
8
330 - Economics
5
363 - Other social problems & services
5
333 - Economics of land & energy
4
380 - Commerce, communications & transportation
4
551 - Geology, hydrology & meteorology
4
615 - Pharmacology & therapeutics
4
800 - Literature & rhetoric
3
140 - Specific philosophical schools
2
170 - Ethics
2
340 - Law
2
370 - Education
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
600 - Technology
2
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
657 - Accounting
1
900 - History & geography
1