Classification
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
2
170 - Ethics
2
200 - Religion
304 - Factors affecting social behavior
1
320 - Political science
1
330 - Economics
3
333 - Economics of land & energy
340 - Law
1
363 - Other social problems & services
370 - Education
1
380 - Commerce, communications & transportation
1
581 - Specific topics in natural history
1
600 - Technology
620 - Engineering & allied operations
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
2
900 - History & geography
1