Classification
000 - Computer science, information & general works
304 - Factors affecting social behavior
363 - Other social problems & services
3
600 - Technology
3
330 - Economics
2
333 - Economics of land & energy
2
370 - Education
2
620 - Engineering & allied operations
2
900 - History & geography
2
200 - Religion
1
320 - Political science
1
340 - Law
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1