Classification
410 - Linguistics
400 - Language
8
900 - History & geography
7
581 - Specific topics in natural history
5
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
800 - Literature & rhetoric
4
000 - Computer science, information & general works
3
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
330 - Economics
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1