1. Additional elements displayed by a menu item or list box from which the user can choose in order to interact with other screen elements. See the illustration.
2. In newsgroup articles, the accumulation of quotation marks (often angle brackets) added by newsgroup readers each time an article is replied to. Most newsgroup readers will copy the original article in the body of the reply; after several replies, the original material will have several quotation marks. See also article, newsgroup, newsreader.