expert systems

[Jadranka Stojanovski]

I am looking for the good examples of the expert system applications in
 libraries for a different library functions as: 
- cataloging
- indexing
- online catalogs
- database searching
- reference services
- other
I appreciate any help (URLs, ...). Thanks in advance!
Kind regards,

Jadranka Stojanovski
Chief librarian
Rudjer Boskovic Institute, Zagreb
Croatia
http://nippur.irb.hr/