| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication terminal unit capable of outputting information useful for various investigations. SOLUTION: A digital composite machine 1 has an operation section (key) 11, a storage means 19a for storing the operation history of the key, and an image recorder 7 and a display unit 9 for outputting the operation history stored at the storage means 19a. In the digital composite machine 1, an output means can output the operation history with the input of a password coinciding with a preregistered one as conditions. In the digital composite machine 1, the operation history can include a date and time when the key is operated. COPYRIGHT: (C)2007,JPO&INPIT
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