Classification
YPW - Economy of industry branches
47
LTO - Biotechnology - application, industry
5
CWE - Chemical engineering, chemical industry - general
4
TCB - Communication and information - theory
4
YRCD - Informatics, information and society
4
YPD - Business economics
3
EWA - Energy economy
2
FMPB - Steel production
2
HYB - Public health, health politics
2
CAE - Chemistry - general
1
DNC - Internet
1
EHA - Renewable energy sources
1
GWA - Raw material economy, raw material policy
1
MSU - Economic analysis
1
TNB - Nuclear power plants
1
UEF - Sustainability
1
UEN - Environmental economy
1
UHK - Traffic and environment - incl. automobile exhaust gas
1
YPG - Business management
1
YPM - National economy
1
YPO - Economic policy
1
YRC - Technology and society
1
YUD - Comprehensive statistical data - Germany
1