Configuring a numeric keypad for a touch screen

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      <subfield code="a">This paper reports on a study comparing keying accuracy and speed for eight different numeric keypad configurations on a touch screen. Using touch-sensitive keypads displayed on a computer terminal, operators entered numbers presented to them through a speech synthesizer</subfield>
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      <subfield code="g">Vol. 31, nº 6, June 1988 ; p. 945-953</subfield>
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