Classification
363 - Other social problems & services
3
380 - Commerce, communications & transportation
581 - Specific topics in natural history
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
330 - Economics
1
370 - Education
1
400 - Language
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1