1. A terminal comprising a touch-sensitive electroluminescent display surface for simultaneously displaying information and for accepting input information through a touch-responsive area in said display surface, and means for coupling said surface to a digital computer for controlling said displaying and for storing and processing said input information, and including means for defining in said touch responsive area an essentially arbitrary pattern A of primary information subareas of said touch-responsive area for providing information, with each defined subarea developing a preselected signal for said computer when touched, a subarea B for recalling a previously displayed pattern of primary information subareas, and subareas C for calling up for display preselected other patterns of primary information subareas.