Classification
320 - Political science
363 - Other social problems & services
576 - Genetics & evolution
700 - The arts; fine & decorative arts
600 - Technology
8
380 - Commerce, communications & transportation
7
140 - Specific philosophical schools
6
620 - Engineering & allied operations
6
330 - Economics
5
333 - Economics of land & energy
5
551 - Geology, hydrology & meteorology
5
000 - Computer science, information & general works
4
900 - History & geography
4
340 - Law
3
500 - Natural sciences & mathematics
3
610 - Medicine & health
3
720 - Architecture
3
304 - Factors affecting social behavior
2
100 - Philosophy & psychology
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
657 - Accounting
1
658 - General management
1