in ergonomics, the design of displays for effective transmission of information in different situations. Displays may be static devices (such as signs, labels, and diagrams) or dynamic devices (such as speedometers, clocks, and temperature gauges). The information conveyed may include directions and instructions, safety messages and alerts, and fluctuating information about the state of a particular system (e.g., speed, volume, or temperature). See bar display; object display; integrated display; separated display. See also display–control compatibility.