Classification
000 - Computer science, information & general works
330 - Economics
340 - Law
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
3
333 - Economics of land & energy
2
370 - Education
2
576 - Genetics & evolution
2
900 - History & geography
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
320 - Political science
1
400 - Language
1
700 - The arts; fine & decorative arts
1