Classification
ETC - Energy conversion
EXA - Energy policy
20
CNW - Electrochemical energy production and conversion
5
EGA - Oil shale, oil sands
4
ETF - Fuel cells - general
4
TKH - Air flight, space flight
4
ECA - Energy resources
3
ETA - Energy storage
3
TKJ - Traffic
3
CNE - Electrochemistry
2
EHA - Renewable energy sources
2
EVA - Energy demand, energy supply - comprehensive works
2
EVN - Energy supply - future aspects
2
EVP - Energy models, energy system analysis
2
TIG - Reliability, safety, quality control
2
UA - Environment - general
2
UHK - Traffic and environment - incl. automobile exhaust gas
2
UKE - Environment and energy resources
2
CLG - Catalysis - surveys, general aspects
1
CNJ - Electrochemistry - comprehensive works
1
CNR - Electrodes
1
CNWK - Electric batteries
1
CWE - Chemical engineering, chemical industry - general
1
EBA - Energy production, energy technology
1
EUA - Energy conservation - general
1
FDA - Solid state reactions - general aspects
1
FFGH - Electron emission, field emission
1
FGC - Crystal growth, crystal technology
1
FGCD - Crystal growth of specific substances
1
FJEG - Organic semiconductors, one dimensional conductors
1
FNC - Molecular crystals, organic crystals
1
FNF - Polymer science - general aspects
1
FNP - Ceramics - specific materials
1
FNPH - Ceramics for specific applications
1
FPTK - Corrosion in specific environments
1
FPTL - High temperature corrosion
1
HBG - Molecular biology in medicine, human genetics
1
LTE - Biotechnology - general aspects
1
LTU - Genetic engineering
1
TBG - Transistors
1
TKF - Power plants
1
TNA - Nuclear engineering - general
1
UKB - Environmental effects and energy
1
UMB - Atmospheric chemistry
1
UMD - Atmospheric models
1
UMN - Air pollution control and measurement
1
USDE - Domestic waste, plastics, paper
1
USU - Waste recycling
1