Classification
300 - Social sciences
363 - Other social problems & services
4
600 - Technology
650 - Management & auxiliary services
657 - Accounting
4
320 - Political science
3
330 - Economics
3
170 - Ethics
2
380 - Commerce, communications & transportation
2
140 - Specific philosophical schools
1
610 - Medicine & health
1
658 - General management
1