Classification
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
27
333 - Economics of land & energy
15
610 - Medicine & health
11
620 - Engineering & allied operations
11
580 - Plants (Botany)
9
380 - Commerce, communications & transportation
8
140 - Specific philosophical schools
7
363 - Other social problems & services
7
414 - Phonology & phonetics
6
576 - Genetics & evolution
6
600 - Technology
6
330 - Economics
5
500 - Natural sciences & mathematics
4
612 - Human physiology
4
300 - Social sciences
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
900 - History & geography
2
630 - Agriculture & related technologies
1
657 - Accounting
1
658 - General management
1