Classification
AHM - Theory of science
158
AHP - Philosophy
17
AHK - Scientific work
10
ZCE - Bibliometrics
8
AMA - Education - general
5
YRB - Social sciences, sociology
5
AHF - Research and science
4
YPB - Economy - general aspects
4
YZA - Politics, political science
4
AHPE - Philosophy of Science
3
AHA - Research and development, research politics - general
2
AHZ - History of science and technology
2
HDH - Neuropsychology
2
LAM - Biology - theoretical and philosophical fundamentals
2
ZBAE - Conferences
2
ZBHC - Electronic publishing
2
AAA - Encyclopedias - general aspects
1
AES - Universities, academies - Germany
1
AHN - Media and communication science
1
AHPD - Epistemology
1
AYA - Sciences - general aspects
1
DCA - Informatics - theoretical
1
HAN - Medicine - mathematical methods, computer applications, databases
1
HDE - Neurology - general aspects
1
HDG - Psychology, psychiatry
1
LGO - Sociobiology, ethology
1
MSH - Mathematical methods in life sciences
1
MWD - Applied graph theory, network analysis
1
PAE - Physics - general interest
1
YPG - Business management
1
YRG - Technology transfer
1
ZBHB - Library networks
1
ZCB - Information science
1