Classification
AFG - Large scale research institutions (Helmholtz Centres)
47
TBC - Electronic circuits
12
CBB - Inorganic chemistry - comprehensive works
11
AQTC - Publication lists of institutions - Germany
10
YRA - Social studies
10
PKA - Elementary particles, nuclei - general
9
HDG - Psychology, psychiatry
8
YBB - Law - general
8
CUK - X-ray spectroscopy
7
DYA - Artificial intelligence
7
YPG - Business management
7
FGKF - Chemical vapor deposition
6
FPU - Corrosion protection, surface coating
6
FPUG - Special purpose coatings
6
AHC - Research and development, research politics - Germany
5
DOQ - Programming languages - Internet
5
EKA - Wind energy
5
FGK - Thin film technology, epitaxy
5
HDE - Neurology - general aspects
5
TBD - Microelectronics
5
TKJ - Traffic
5
CHJ - Molecular physics, molecular structure
4
CHN - Quantum chemistry
4
CLP - Colloid chemistry, surface chemistry
4
CNR - Electrodes
4
CRHN - Chemistry of isotopic nuclides
4
CT - Chemical methods of materials analysis
4
DNC - Internet
4
FJKB - Elemental semiconductors
4
PBA - Quantum theory
4
PKH - Neutron physics
4
PKPB - Electromagnetic transitions
4
TNH - Research reactors
4
YPGK - Marketing
4
CBM - Inorganic synthesis and reactions of the elements and their compounds - general aspects
3
CEN - Metal organic compounds - synthesis and reactions
3
CNWK - Electric batteries
3
DOL - Programming language - Python
3
DUA - Text and document processing
3
DZE - Data privacy, data security
3
EXA - Energy policy
3
FFJE - Molecular surface processes, gas surface interaction, adsorption
3
FNX - Carbon, carbon materials
3
GNA - Geology - soil sciences
3
HCR - Imaging techniques in medicine
3
HTJ - Tumors
3
HYB - Public health, health politics
3
LTS - Pharmaceutical biotechnology
3
LTT - Enzyme technology, protein engineering
3
PJA - Atomic physics - general
3
more ...