Columbia subject headings:
Database searching.
Library science--Computer programs.
Natural language processing (Computer science)
Online bibliographic searching.
Reference services (Libraries)--Automation.
Telecommunication in libraries.
User interfaces (Computer systems)
Harvard subject headings:
Princeton subject headings:
Database searching.
Library science--Computer programs.
Natural language processing (Computer science)
Online bibliographic searching.
Reference services (Libraries)--Automation.
Telecommunication in libraries.
User interfaces (Computer systems)