Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
658 - General management
140 - Specific philosophical schools
1
300 - Social sciences
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
610 - Medicine & health
1