Library catalog
Overview
 
A library catalog is a register of all bibliographic
Bibliography
Bibliography , as a practice, is the academic study of books as physical, cultural objects; in this sense, it is also known as bibliology...

 items found in a library
Library
In a traditional sense, a library is a large collection of books, and can refer to the place in which the collection is housed. Today, the term can refer to any collection, including digital sources, resources, and services...

 or group of libraries, such as a network of libraries at several locations. A bibliographic item can be any information entity (e.g., books, computer files, graphics, realia
Realia (library science)
In library classification systems, the term realia refers to three-dimensional objects from real life such as coins, tools, and textiles, that do not easily fit into the orderly categories of printed material...

, cartographic materials, etc.) that is considered library material (e.g., a single novel
Novel
A novel is a book of long narrative in literary prose. The genre has historical roots both in the fields of the medieval and early modern romance and in the tradition of the novella. The latter supplied the present generic term in the late 18th century....

 in an anthology
Anthology
An anthology is a collection of literary works chosen by the compiler. It may be a collection of poems, short stories, plays, songs, or excerpts...

), or a group of library materials (e.g., a trilogy
Trilogy
A trilogy is a set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in literature, film, or video games...

), or 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.

The card catalog was a familiar sight to library users for generations, but it has been effectively replaced by the online public access catalog (OPAC).
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