Classification
YPB - Economy - general aspects
933
YZA - Politics, political science
156
EXA - Energy policy
28
AHF - Research and science
27
MSU - Economic analysis
26
YUD - Comprehensive statistical data - Germany
25
YBB - Law - general
24
YPM - National economy
18
YRG - Technology transfer
13
YUC - Comprehensive statistical data
11
AHP - Philosophy
10
YPO - Economic policy
9
AMA - Education - general
8
UEA - Environmental policy and economy - general aspects
7
TEK - Electric experiments, reliability and technology
6
UEN - Environmental economy
6
AHZ - History of science and technology
5
EWA - Energy economy
5
UEF - Sustainability
5
YRB - Social sciences, sociology
5
AHM - Theory of science
4
YPD - Business economics
4
YPG - Business management
4
AJA - Directories - general
3
ALA - Nobel prize winners - collected papers
3
DPA - Electronic data processing - applications
3
TIA - Industrial engineering - general
3
UA - Environment - general
3
AAE - Popular science - general aspects
2
ACE - Germanic languages, Indo-Germanic languages
2
AMAB - Industrial training, further education
2
DAE - Information technology - general
2
DMC - Computer programs
2
EHA - Renewable energy sources
2
GWA - Raw material economy, raw material policy
2
LWE - Agriculture - general aspects
2
TBD - Microelectronics
2
TIG - Reliability, safety, quality control
2
TNQ - Nuclear reactor operation, control, measurement
2
UAM - Environmental models
2
UCA - Environmental problems, man and environment - general aspects
2
UED - Environmental policy
2
YRAF - Equal opportunities
2
YRCD - Informatics, information and society
2
ZBEBB - Subject indexing
2
ZCB - Information science
2
AES - Universities, academies - Germany
1
AHA - Research and development, research politics - general
1
AHC - Research and development, research politics - Germany
1
AHH - Universities - research
1
more ...