Card Catalog
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A card catalog is an alphabetical file of subjects, authors and titles for material that is acquired by a university library. It is usually organised using a single card for every item in the library for easier recovery.
There are quite different kinds of card catalog.
Author Card
Contains the Author's full name, last name first, the title of the book, the place of publication, publishers name, and the date of publication, as well as the number of the book.
Title Card
For a book contains basically the same, date found in the author card except that the title appears the first line.
Subject Card
Are useful when one is doing research on the topic and does not have a particular title or author in mind.
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OPAC- Online Public Access Catalog
An online public access catalog (often abbreviated as OPAC or simply library catalog) is an online database of materials held by a library or group of libraries. Users search a library catalog principally to locate books and other material available at a library.