An Online Public Aces Catalog (often abbreviated as OPAC or simply Library Catalog) is an online database of materials held by a library or group of libraries. User search in library catalog principally to locate books and other material available at a library. In simple language it is an electronic version of the card caalog. OPAC is the gateway to library’s collection. Information about documents can be searched using powerful search engine according to:
Class No., ISB No.
Publication year and so on…