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