Classification
000 - Computer science, information & general works
1
100 - Philosophy & psychology
140 - Specific philosophical schools
1
170 - Ethics
1
320 - Political science
1
330 - Economics
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
363 - Other social problems & services
1
380 - Commerce, communications & transportation
610 - Medicine & health
650 - Management & auxiliary services
657 - Accounting
1
658 - General management
1