Classification
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
333 - Economics of land & energy
340 - Law
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
200 - Religion
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
530 - Physics
1
600 - Technology
1
620 - Engineering & allied operations
1
900 - History & geography
1