26. The apparatus of claim 21 comprising: means for deducing from the plurality of actuations a plurality of characters when the plurality of actuations corresponds to more than one character; a screen for displaying the plurality of characters; means for detecting a selection by a user of one of the plurality of characters; and means for second encoding a correct character in response to a selection detected by the means for detecting a selection.
26. The apparatus of claim 21 comprising: means for deducing from the plurality of actuations a plurality of characters when the plurality of actuations corresponds to more than one character; a screen for displaying the plurality of characters; means for detecting a selection by a user of one of the plurality of characters; and means for second encoding a correct character in response to a selection detected by the means for detecting a selection. 27. The apparatus of claim 26 wherein: the plurality of characters is displayed on the screen in order of frequency of usage; and the means for detecting a selection includes a shift key which is not actuated to select a first of the plurality of characters and which is actuated to select a later one of the plurality of characters.