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