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