Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
11
330 - Economics
8
551 - Geology, hydrology & meteorology
7
333 - Economics of land & energy
6
580 - Plants (Botany)
6
620 - Engineering & allied operations
6
576 - Genetics & evolution
5
320 - Political science
4
414 - Phonology & phonetics
4
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
600 - Technology
4
612 - Human physiology
4
300 - Social sciences
3
500 - Natural sciences & mathematics
3
304 - Factors affecting social behavior
2
340 - Law
2
370 - Education
2
658 - General management
2
720 - Architecture
2
900 - History & geography
2
100 - Philosophy & psychology
1
400 - Language
1
550 - Earth sciences
1
630 - Agriculture & related technologies
1
657 - Accounting
1
800 - Literature & rhetoric
1