A classic collection of various interaction design touch points are represented in the Apollo Command Module main display console. Note how functional elements are grouped into zones. Controls were designed to meet military specifications and to be resist unintended activation by weightless astronauts floating about the Command Module. Also worth noting is the clever way programmers maximized limited computer processing capabilities available during the late 1960's. The Noun/Verb approach in the LED display area allowed astronauts to reference numbers from the display with an noun/verbal look up table to program their desired routines.