Classification
HDG - Psychology, psychiatry
607
YRB - Social sciences, sociology
55
YRA - Social studies
47
AHP - Philosophy
26
HDS - Neurophysiology, neuroanatomy
26
HDE - Neurology - general aspects
22
LGT - Neurobiology, neurophysiology
14
YPG - Business management
13
YPGE - Human resource planning, human resource management
13
HAN - Medicine - mathematical methods, computer applications, databases
12
HYG - Occupational medicine, sports medicine
12
AHN - Media and communication science
11
HDF - Brain - anatomy, function, disorders
11
AHPC - Ethics
10
HWP - Gerontology, geriatrics
9
AMA - Education - general
8
HYB - Public health, health politics
7
LGO - Sociobiology, ethology
7
YPF - Labour science
7
HAM - Medicine - theoretical and philosophical fundamentals
6
AHK - Scientific work
5
AMAB - Industrial training, further education
4
HPK - Special pharmacology, drug design
4
HVA - Internal medicine - comprehensive works
4
HYH - Traumatology, emergency medicine, disasters
4
MWH - Statistics
4
YPFB - Efficiency of labour
4
YRC - Technology and society
4
HDH - Neuropsychology
3
LAM - Biology - theoretical and philosophical fundamentals
3
DNC - Internet
2
DYA - Artificial intelligence
2
DZC - Man and computer
2
HAA - Medicine - reference books
2
HCR - Imaging techniques in medicine
2
LBL - Evolution - general
2
MWE - Decision theory, game theory
2
TNO - Nuclear reactor safety
2
UCA - Environmental problems, man and environment - general aspects
2
YPD - Business economics
2
YPE - Job application, job search
2
YRAB - Gender studies
2
AFC - Research institutions, scientific organizations - Germany ( DFG, MPG, FHG )
1
AHL - Presentations, lectures, discussions
1
AHM - Theory of science
1
AHPD - Epistemology
1
AHPE - Philosophy of Science
1
ALE - Biographies of scientists and Nobel prize winners - individual
1
AYA - Sciences - general aspects
1
CTON - Tracer techniques
1
more ...