Classification
AHL - Presentations, lectures, discussions
3
AMA - Education - general
2
AMAB - Industrial training, further education
2
HDG - Psychology, psychiatry
2
AHH - Universities - research
1
ALH - Works of scientists and Nobel prize winners
1
D - Computer sciences
1
HAN - Medicine - mathematical methods, computer applications, databases
1
HCN - Nuclear medicine
1
HDF - Brain - anatomy, function, disorders
1
LAM - Biology - theoretical and philosophical fundamentals
1
LBLA - Evolution - history
1
PKA - Elementary particles, nuclei - general
1
PLA - Astrosciences - general
1
TBA - Electronic engineering - general
1
ZFA - Teaching materials, learning aids
1