| 摘要 |
PROBLEM TO BE SOLVED: To obtain a portable telephone set capable of performing a desired function with a simple operation. SOLUTION: This portable telephone set 1 that can perform various functions selected from a hierarchically formed menu is provided with a dedicated execution key 9 for instructing function performance, a function allocating means 11 for allocating an optional function to the key 9, and a function performing means 11 for performing a function allocated to the key 9 in response to the depression of the key 9.
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