In interactive display systems, a message on the display surface of a display device to help the user to plan and execute subsequent operations. Note: Examples of prompts include (a) a blinking message displayed on a screen to inform the system operator of the status, condition, or mode the system is in and requiring the operator to take some action, and (b) a message that the system is ready to accept a command. 2. In a computer, communications, or data processing system, to inform a user that the system is ready for the next command, data element, or other input.