| 摘要 |
An improved alphabet entry method is provided in which several particular keys are added to provide favorable operability when a sentence is entered with selection of an entry word candidate from a plurality of possible letter strings based on typing through a search of a word dictionary. Each of some of data keys (132 to 139) is assigned a plurality of letters of the alphabet, and each of some of the other data keys (131, 141) and some of control keys (117, 119, 120, and 122) is assigned only one of particular letters (A, S, U, E, I, and O) of the plurality of letters assigned to the some of the data keys simultaneously with the assignment to the some keys. Since an operator performs entry with the keys assigned only the particular letters to determine some letters in a letter string to be entered, candidates for a word are narrowed down to allow efficient word entry.
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