Classification
GVA - Oceanography
9
CXW - Water and seawater desalination - chemistry and technology
4
UA - Environment - general
4
EIP - Photovoltaics
3
EPK - Nuclear energy
3
GBHC - Ocean floor - sediments, morphology
3
PKL - Elementary particles - interactions, reactions, resonances
3
TGH - Technical optics
3
UXV - Radioactive waste disposal - interim and final
3
YPB - Economy - general aspects
3
AHZ - History of science and technology
2
CT - Chemical methods of materials analysis
2
CUA - Spectroscopy
2
DMF - Software engineering
2
EXA - Energy policy
2
FLK - High pressure physics and technology
2
GBH - Marine geology
2
GWDA - Manganese nodules - occurrence, deep ocean mining
2
MAF - Mathematics - general series
2
MSD - Mathematical methods in physics
2
PLA - Astrosciences - general
2
THQ - Fluid mechanics and dynamics
2
YZA - Politics, political science
2
AAA - Encyclopedias - general aspects
1
AHA - Research and development, research politics - general
1
AMA - Education - general
1
AQSP - Catalogues of individual libraries - monographs
1
CER - Macromolecular compounds - synthesis and reactions
1
CHLK - Intermolecular forces
1
CHRM - Liquids and their properties
1
CLPM - Aerosols - excl. environmental aspects
1
CWO - Separation and combination processes - mechanical
1
DAA - Information technology - reference books
1
DMAF - Object oriented programming
1
DPAD - Data mining, text mining, big data
1
DYA - Artificial intelligence
1
EGA - Oil shale, oil sands
1
EIA - Solar energy - general
1
EIC - Solar thermal energy conversion
1
EIK - Solar energy application
1
EUL - Heat pumps
1
EVA - Energy demand, energy supply - comprehensive works
1
FECE - Critical phenomena
1
FEFJ - Quasicrystals
1
FHCB - X-ray scattering
1
FHN - Neutron scattering
1
FKC - Magnetism - specific aspects
1
FKCE - Random magnetic systems, mixed valence phenomena
1
FKG - Magnetic materials
1
FKM - Magnetism in nonmagnetic materials
1
more ...