Classification
333 - Economics of land & energy
580 - Plants (Botany)
610 - Medicine & health
14
000 - Computer science, information & general works
13
700 - The arts; fine & decorative arts
13
600 - Technology
10
620 - Engineering & allied operations
9
363 - Other social problems & services
8
380 - Commerce, communications & transportation
8
576 - Genetics & evolution
8
140 - Specific philosophical schools
5
330 - Economics
5
551 - Geology, hydrology & meteorology
5
581 - Specific topics in natural history
5
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
300 - Social sciences
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
900 - History & geography
3
100 - Philosophy & psychology
2
630 - Agriculture & related technologies
2
658 - General management
2
340 - Law
1
370 - Education
1
400 - Language
1
615 - Pharmacology & therapeutics
1
720 - Architecture
1
800 - Literature & rhetoric
1