Classification
TKB - Civil engineering - buildings
335
EUC - Energy conservation - civil engineering
16
TKD - Air conditioning, refrigeration
14
TKA - Civil engineering - general
11
EUA - Energy conservation - general
8
TAT - Engineering Standards
8
TEA - Electrical engineering - general
7
AHZ - History of science and technology
5
FAF - Materials research - comprehensive works
5
TIA - Industrial engineering - general
5
UHCH - Urban areas
5
CAU - Laboratory and safety engineering in chemistry
4
TIG - Reliability, safety, quality control
4
TKB - Civil engineering - buildings
3
UHC - Area planning and environment
3
YDS - Building law
3
YPG - Business management
3
CXRC - Natural gas
2
CXRH - Liquefied natural gas
2
DMC - Computer programs
2
EFA - Petroleum, natural gas
2
FAP - Advanced materials - development and applications
2
FEJP - Porous media, capillarity
2
TEJ - Electric devices, mechanical devices, magnets, dielectrics
2
TGN - Control engineering
2
THD - Design and construction in mechanical engineering
2
TIJ - Furnaces, combustion plants
2
UEF - Sustainability
2
UPW - Drinking water
2
YFF - Industrial safety regulations
2
CWGE - Chemical plants - planning, construction, operation
1
CXU - Inorganic and organic material - chemistry and technology
1
EAE - Energy - general
1
EIM - Solar architecture
1
EUL - Heat pumps
1
EVP - Energy models, energy system analysis
1
FAH - Materials research - general aspects
1
FNS - Glass, vitreous ceramics
1
FNVL - Composite materials - mechanical properties
1
FPGD - Creep
1
FPUG - Special purpose coatings
1
HAM - Medicine - theoretical and philosophical fundamentals
1
HBX - Experimental medicine, laboratory animals
1
HYE - Environmental health
1
LAQ - Laboratory and safety engineering in biology
1
LEE - Botany - general aspects
1
MNLB - Computational methods in physics
1
PDA - Mechanics - general
1
TCD - Communication systems
1
TED - Electric power - industrial aspect
1
more ...