Classification
AYA - Sciences - general aspects
AHK - Scientific work
2
AHP - Philosophy
2
AHZ - History of science and technology
2
AHL - Presentations, lectures, discussions
1
AHM - Theory of science
1
AHN - Media and communication science
1
AMA - Education - general
1
DAE - Information technology - general
1
DVA - Data and file management
1
DWI - Information management
1
HAE - Popular medicine
1
HDF - Brain - anatomy, function, disorders
1
HDG - Psychology, psychiatry
1
YRC - Technology and society
1
ZCB - Information science
1