A catalogue is a list of things, arranged in some order, and can refer to a printed or online copy of the list. It is often used to refer to a list of things being offered for sale, such as items for sale or courses at a school, and is typically arranged in an orderly way with descriptions so that the items can be easily found. Catalogues can also be used to refer to a collection of works, such as by a particular artist. In a library, a card catalogue is a file containing information about the books and other materials held in the library. Catalogues can also be used as a verb, meaning to make a list of things. In the world of marketing, a catalogue is a publishing tool that businesses use to market their products and services to consumers, and it can be accessed digitally by consumers.