Classification
AMA - Education - general
46
ZBB - Library staff
22
ZCA - Documentation
12
AMAB - Industrial training, further education
9
LVE - Food science - general
6
ZCB - Information science
5
YPD - Business economics
4
YPF - Labour science
3
ZBAD - Library science
3
ZFA - Teaching materials, learning aids
3
AHL - Presentations, lectures, discussions
2
ASF - Training of library professionals
2
ATG - Training of documentalists
2
LEE - Botany - general aspects
2
LWE - Agriculture - general aspects
2
TBA - Electronic engineering - general
2
YFA - Labour legislation
2
YPGK - Marketing
2
YPH - Secretarial work, office management
2
ZBAE - Conferences
2
ZBAF - Festschrifts
2
AEG - Official corporations - Germany
1
AFG - Large scale research institutions (Helmholtz Centres)
1
AFS - Foundations, prizes
1
AHC - Research and development, research politics - Germany
1
AHNC - Journalism
1
AHO - linguistics, literary studies
1
AHX - History - general
1
CAE - Chemistry - general
1
DWID - Multimedia, hypertext
1
HDG - Psychology, psychiatry
1
HJK - Clinical immunology, allergy, immunosuppression
1
HYG - Occupational medicine, sports medicine
1
TEDF - Electric power application
1
THJB - Mechanical working
1
YFH - Social legislation
1
YPE - Job application, job search
1
YPGE - Human resource planning, human resource management
1
YPI - Corporate governance
1
YRA - Social studies
1
YRB - Social sciences, sociology
1
YRG - Technology transfer
1
ZAB - Media studies (without bibliology)
1
ZBDA - Library management
1
ZBH - Digital library
1
ZBJ - Library types
1
ZBJD - Libraries and library science - international
1
ZDA - Museums
1
ZEA - Archives
1