Classification
ACE - Germanic languages, Indo-Germanic languages
2
THA - Mechanical engineering - general
2
ACA - Languages, dictionaries - general
1
CT - Chemical methods of materials analysis
1
CUW - Mass spectroscopy
1
PAE - Physics - general interest
1
PGLB - Toroidal confinement
1
PGN - Fusion technology, plasma devices
1
PKRN - Nucleon induced reactions and scattering
1
THT - Vacuum technique
1
YEE - Law on radiation protection
1