Classification
ACE - Germanic languages, Indo-Germanic languages
1
CBB - Inorganic chemistry - comprehensive works
1
DOQ - Programming languages - Internet
1
DWAC - Relational database systems
1
MAK - Mathematics - formulae, tables
1
PCG - Transport theory - diffusion theory, filter processes
1
TIE - Process engineering
1
YEA - Environmental law
1
YEE - Law on radiation protection
1
YEN - Atomic energy law
1
YFD - Public service legislation
1