beacon(A snippet of software placed in an advertisement or e-mail message, or on a Web page to help measure delivery of the item to a Web browser and to track a user's actions in general); markup(The tags to mark elements, such as text and graphics, in a document to indicate how Web browsers should display these elements to the user and should respond to user actions)
Tags(A feature that allows the user to apply custom or default markers to items (e.g. Outlook messages or OneNote content) in order to categorize information for easy retrieval and sorting)
