Classification
AHL - Presentations, lectures, discussions
137
AHK - Scientific work
6
DTAG - MS - PowerPoint
6
AMA - Education - general
5
YPF - Labour science
5
AHN - Media and communication science
4
AHJ - Training methods
3
YPE - Job application, job search
3
AHO - linguistics, literary studies
2
AMAB - Industrial training, further education
2
YRA - Social studies
2
011 - Simulation Science (advanced reading)
1
AAD - General handbooks of knowledge
1
AAE - Popular science - general aspects
1
AHH - Universities - research
1
ASEA - Book production, printing, paper, script
1
AYA - Sciences - general aspects
1
DNC - Internet
1
DPA - Electronic data processing - applications
1
HDG - Psychology, psychiatry
1
MWH - Statistics
1
PKF - Elementary particles, nuclei - measuring methods and instruments
1
YPB - Economy - general aspects
1
YPG - Business management
1
YPH - Secretarial work, office management
1
YPI - Corporate governance
1
ZFA - Teaching materials, learning aids
1