Abstract

Greg Ching*

A library catalogue is a list of all bibliographic items in a library or a set of libraries, such as a network of libraries spread across multiple sites. A union catalogue is a catalogue that serves a group of libraries. A bibliographic item can be any type of information entity, such as books, computer files, graphics, regalia, cartographic materials, and so on, that is considered library material, or a group of library materials, or linked from the catalogue as long as it is relevant to the catalogue and to library patrons.