| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compact portable mail terminal device allowed to be simply operated by one hand and capable of easily executing the operation of various functions. SOLUTION: The compact portable mail terminal device 10 for transmitting/ receiving mails by connecting a mobile telephone 100 can execute basic operation only by operation keys consisting of a menu key, a cursor moving key, an execution key, and a cancel key and has a key operation display means 24 for displaying usable keys out of the operation keys on each operating picture.</p> |
