Classification
AMA - Education - general
AHF - Research and science
4
AES - Universities, academies - Germany
2
ACA - Languages, dictionaries - general
1
AHH - Universities - research
1
AHL - Presentations, lectures, discussions
1
AJA - Directories - general
1
CAX - Chemistry - information systems, literature guides
1
YBB - Law - general
1
YPH - Secretarial work, office management
1