Classification
ABM - Special subject biographies
2
ACA - Languages, dictionaries - general
4
ACE - Germanic languages, Indo-Germanic languages
8
ACH - Romance languages
5
ACZ - Lists of abbreviations
1
AHC - Research and development, research politics - Germany
1
AHF - Research and science
7
AHK - Scientific work
1
AHM - Theory of science
1
AHP - Philosophy
5
AHPC - Ethics
1
AHZ - History of science and technology
1
AQAF - Reference guides to government publications
1
CAA - Chemistry - reference books
2
CAU - Laboratory and safety engineering in chemistry
1
CHRD - Gases and their properties
1
CLE - Combustion, flames, explosions
1
CR - Nuclear chemistry, radiation chemistry
2
CRCD - Nuclear reactions
1
CWE - Chemical engineering, chemical industry - general
4
CWS - Separation processes - nonmechanical
1
CXL - Coal liquefaction
1
CXM - Coal combustion
1
CXX - Hydrogen production - chemistry and technology
1
DAE - Information technology - general
1
DEA - Formal languages, machine oriented, assembler
1
DMAF - Object oriented programming
1
DMC - Computer programs
3
DNC - Internet
1
DOE - Programming language - BASIC, Turbo BASIC, Visual BASIC
1
DOFC - Programming language - C plus-plus
1
DOZ - Programming languages - Other
3
DPA - Electronic data processing - applications
2
DWA - Database systems
1
DYE - Expert systems
1
EAA - Energy - reference books
1
EAD - Energy - comprehensive works
1
EAE - Energy - general
2
EBA - Energy production, energy technology
3
ECA - Energy resources
2
EEA - Coal - general
1
EFA - Petroleum, natural gas
2
EHA - Renewable energy sources
4
EKA - Wind energy
1
ENA - Energy from biomass and waste
1
EPA - Uranium - nuclear fuel
1
EPK - Nuclear energy
17
ESA - Synthetic fuels - utilization
1
ESB - Hydrogen energy
3
ETA - Energy storage
1
more ...