Classification
AHF - Research and science
3
YBB - Law - general
3
ETF - Fuel cells - general
2
THA - Mechanical engineering - general
2
YDX - Contract law
2
YPB - Economy - general aspects
2
ACE - Germanic languages, Indo-Germanic languages
1
AMA - Education - general
1
CNWK - Electric batteries
1
DYA - Artificial intelligence
1
EBA - Energy production, energy technology
1
ECA - Energy resources
1
EGA - Oil shale, oil sands
1
EHA - Renewable energy sources
1
EIP - Photovoltaics
1
EKA - Wind energy
1
ENA - Energy from biomass and waste
1
ESB - Hydrogen energy
1
EUA - Energy conservation - general
1
FAP - Advanced materials - development and applications
1
FMPB - Steel production
1
FMTG - High temperature alloys
1
FNP - Ceramics - specific materials
1
GDA - Engineering geology - general
1
GFA - Mineralogy - general
1
LWE - Agriculture - general aspects
1
TCG - Office communication, ISDN
1
THS - Turbines, pumps
1
TIA - Industrial engineering - general
1
TIE - Process engineering
1
TKL - Mining - technical aspects
1
UCJ - Environmental protection - general aspects
1
UKA - Environmental damage and energy production
1
UKB - Environmental effects and energy
1
YFH - Social legislation
1
YPG - Business management
1