Alphabetic Data Entry via the Touch-Tone Pad: A Comment
Sidney L. Smith, Nancy C. Goodwin · Human Factors The Journal of the Human Factors and Ergonomics Society · 1971
Computer analysis indicates the feasibility of single-stroke keying for data entry of alphabetic names using the standard touch-tone telephone pad. In many practical job situations little ambiguity will result from the single-keying technique, and this ambiguity can be resolved under computer control.