Touch-Tone Input Techniques; Data Entry Using a Constrained Keyboard
Edward Desautels, S.B. Soffer
The problem involved in using a smaller alphabet than that naturally called for are investigated, with attention focussed on the use of 12 digit keyboards such as found on touch-tone (trademark reg.) telephones. The feasibility of avoiding the ue of codebooks or user encodings is examined for some medical information systems, and a technique to minimize redundant inputs is described.