Computer Sciences Dept.

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.

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