Classification
ZCB - Information science
6
ZBAE - Conferences
5
ZBH - Digital library
5
ZCC - Information technology
5
DWI - Information management
4
ZCA - Documentation
2
DKAI - Unix - operating system
1
DWID - Multimedia, hypertext
1
YNA - Patents, trademarks
1
YPB - Economy - general aspects
1
ZBDB - Quality management
1
ZCD - Information retrieval
1