Carol M Auer, Daniel L Castagno, Allen W Haley Jr, Harry H Moore IV, Sean E O Leary, Steven J Paley, Thomas E Rutt: Computer interface device. American Telephone and Telegraph Company AT&T Bell Laboratories, Robert O Nimtz, Henry T Brendzel, February 16, 1988: US04725694 (216 worldwide citation)

A computer terminal device includes a flat screen display element and a touch-sensitive element. Simulated keyboards can be displayed on the display element and, in response to the touching of the simulated keys, generate appropriate control signals. The same flat screen display can also be used to ...