Online Public Access Catalogs (OPACs)
OPACs are typical example of limited features of information retrieval systems
An OPAC is mainly used to search for and retrieve information from and about published documents (books, journals, Theses, CDs, DVDs, etc)
Mainly used by libraries but can be useful for any organization with a collection of published information sources
Provide very limited bibliographic entry searches such as title, author (creator), publisher, etc
OPACs usually have less
sophisticated search and
retrieval that other categories of
information
retrieval system
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