1. An information retrieval device for displaying a document, comprising: non-volatile memory for storing said document; a plurality of input selector switches; a display screen; controller circuitry connected to said non-volatile memory, said input selector switches, and said display screen, said controller circuitry determining which portion of said document to display on said display screen, responsive to said plurality of input selector switches; and said controller circuitry refreshing said display screen directly from said non-volatile memory.