Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
2
170 - Ethics
330 - Economics
361 - Social problems & social welfare in general
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
200 - Religion
1
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
600 - Technology
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1