Online Public Access Catalog




<library> (OPAC) A computerised system to catalogue and organise materials in a library (the kind that contains books).

OPACs have replaced card-based catalogues in many libraries.

An OPAC is available to library users (public access).



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On-Line Analytical Processing
Online Computer Library Center, Inc.
On-Line Computer system
Online Media
On-line Process Synthesizer
 OPAC
 On-Line Transaction Processing
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