Classification
FHN - Neutron scattering
28
CER - Macromolecular compounds - synthesis and reactions
9
FNF - Polymer science - general aspects
8
YNA - Patents, trademarks
8
CT - Chemical methods of materials analysis
7
EWA - Energy economy
7
GTAK - Hydrogeology
7
HDF - Brain - anatomy, function, disorders
7
CXUV - Polymers, dyes
6
FNL - Polymers, plastics - specific materials
6
TEA - Electrical engineering - general
6
YDM - Commercial law, commercial legislation
6
CTA - Chemical analysis - comprehensive works
5
TAT - Engineering Standards
5
UPVC - Groundwater
5
YBB - Law - general
5
CTR - Chromatography
4
FJKC - III - V semiconductors
4
FMXD - Metal hydrogen systems - general aspects
4
FNG - Polymer structure, polymer dynamics
4
FNJ - Plastics - general aspects
4
HBC - Physiological chemistry, biochemistry
4
HDE - Neurology - general aspects
4
HDH - Neuropsychology
4
LEL - Botany - lower plants
4
LTT - Enzyme technology, protein engineering
4
MSB - Chaos, nonlinear dynamical systems
4
PAD - Physics - comprehensive works
4
TBT - Optoelectronics, optical fibers, displays
4
UEN - Environmental economy
4
URA - Soil chemistry
4
CTF - Chemical analytical methods
3
DVA - Data and file management
3
EXA - Energy policy
3
FGCD - Crystal growth of specific substances
3
FGK - Thin film technology, epitaxy
3
FGKC - Vacuum deposition, MBE
3
FNK - Plastics - application, engineering aspects
3
FPU - Corrosion protection, surface coating
3
GPAB - Flora, vegetation - geographical aspects
3
HYE - Environmental health
3
LCR - Ecology of microorganisms - land and water
3
LEK - Botany - systematics, taxonomy
3
LGD - Zoology - comprehensive works
3
LHD - Microbiology - comprehensive works
3
LMH - Biophysics - methods
3
LWH - Agriculture - soil sciences
3
PEG - Optics
3
PKC - Elementary particles, nuclei - general theory
3
TED - Electric power - industrial aspect
3
more ...