topic(The subject of a dynamic data exchange (DDE) conversation between two applications); theme(A set of coordinated graphic elements applied to a document or Web page, or across all pages in a Web site. Themes can consist of designs and color schemes for fonts, link bars, and other page elements)
Topics(A feature of the Bing News app that lets users choose specific news topics to appear in their news feed, allowing them to personalize the app with these choices)
