Classification
YPG - Business management
21
YRA - Social studies
2
AEA - Corporations - official - university - etc
1
AHJ - Training methods
1
AHN - Media and communication science
1
YPB - Economy - general aspects
1
YPF - Labour science
1
YPGE - Human resource planning, human resource management
1
YRB - Social sciences, sociology
1