Classification
140 - Specific philosophical schools
610 - Medicine & health
700 - The arts; fine & decorative arts
333 - Economics of land & energy
10
000 - Computer science, information & general works
9
576 - Genetics & evolution
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
6
600 - Technology
6
580 - Plants (Botany)
5
620 - Engineering & allied operations
5
330 - Economics
4
400 - Language
4
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
300 - Social sciences
3
304 - Factors affecting social behavior
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
370 - Education
2
800 - Literature & rhetoric
2
530 - Physics
1
615 - Pharmacology & therapeutics
1
658 - General management
1
900 - History & geography
1