Online Public Access Card Catalog

1. The online public access catalog, often abbreviated OPAC

2. Frequently synonymous with library catalog

3. Online database of materials held by a library or group of libraries.

4. Online catalogs progressed from analog card catalogs

5. similarly enable searching the library's collection of books and other materials.

Manual Library Card Catalog

1. A library catalog (or library catalogue in British English) is a register of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations.

2. A bibliographic item can be any information entity (e.g., books, computer files, graphics, realia, cartographic materials, etc.)

3. It is considered library material (e.g., a single novel in an anthology)

4.Is a group of library materials (e.g., a trilogy)

5. It is linked from the catalog (e.g., a webpage) as far as it is relevant to the catalog and to the users (patrons) of the library.

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