Classification
AAE - Popular science - general aspects
1
ABD - National biographic catalogues - Germany
1
ACA - Languages, dictionaries - general
1
ACZ - Lists of abbreviations
1
AED - Official corporations - international and supranational
4
AEG - Official corporations - Germany
10
AEK - Official corporations - Europe
1
AHA - Research and development, research politics - general
3
AHC - Research and development, research politics - Germany
2
AHE - Research and development, research politics - foreign countries
1
AHF - Research and science
27
AHM - Theory of science
4
AHN - Media and communication science
1
AHP - Philosophy
8
AHPE - Philosophy of Science
1
AHX - History - general
2
AHZ - History of science and technology
1
AJA - Directories - general
4
AMA - Education - general
7
AXA - Geographic surveys - specific countries
1
CHRV - Water and its properties
1
CWE - Chemical engineering, chemical industry - general
1
CX - Fossil fuel technology, special chemicals technology
1
DMC - Computer programs
1
DNC - Internet
2
DWI - Information management
2
DZC - Man and computer
1
EPK - Nuclear energy
10
EXA - Energy policy
11
GCAC - Regional geology - noneuropean countries
1
GTA - Hydrology - general
1
GWA - Raw material economy, raw material policy
1
HYB - Public health, health politics
2
LCK - Ecology - general aspects
1
LTE - Biotechnology - general aspects
2
LWE - Agriculture - general aspects
1
PLA - Astrosciences - general
1
TBD - Microelectronics
1
TCA - Communication science - general
3
THD - Design and construction in mechanical engineering
1
TIG - Reliability, safety, quality control
2
TKH - Air flight, space flight
1
TNA - Nuclear engineering - general
2
TNO - Nuclear reactor safety
1
TNW - Nuclear controversy
4
UA - Environment - general
6
UCA - Environmental problems, man and environment - general aspects
1
UCJ - Environmental protection - general aspects
2
UEA - Environmental policy and economy - general aspects
3
UED - Environmental policy
11
more ...