Classification
000 - Computer science, information & general works
2
330 - Economics
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
600 - Technology
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
657 - Accounting
1
658 - General management
1