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