Classification
000 - Computer science, information & general works
304 - Factors affecting social behavior
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
900 - History & geography
3
320 - Political science
2
333 - Economics of land & energy
2
580 - Plants (Botany)
2
200 - Religion
1
300 - Social sciences
1
330 - Economics
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1