Classification
333 - Economics of land & energy
340 - Law
370 - Education
600 - Technology
4
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
900 - History & geography
3
000 - Computer science, information & general works
2
330 - Economics
2
380 - Commerce, communications & transportation
2
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
400 - Language
1
500 - Natural sciences & mathematics
1
530 - Physics
1
720 - Architecture
1