Calculator with a displayed commercial message

A commercial message-imparting calculator of a type sized to be hand held and using a keyboard to position numerical indicia on a display screen, said calculator comprising a housing having spaced-apart top, bottom and opposite edges bounding a display opening above said keyboard, a clear glass panel means serving as a first component of said display screen disposed in said display opening, a first foreground-observed indicia confined to content of a numerical nature positioned by operation of said keyboard on said clear glass panel means, and a second background-observed indicia primarily confined to content of a textual nature imprinted on an opaque second panel serving as a second component of said display screen disposed in a clearance position rearwardly of said clear glass panel means, whereby there is simultaneously displayed on said display screen said numerical indicia as foreground and through clear areas of said glass panel means said textual indicia as background and said numerical and textual content differences serve to identify said textual content as a commercial message.