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