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