| 摘要 |
A system comprising a processor and an input device. The input device has a first communication port disposed thereon. The first communication port is configured to wirelessly communicate keystrokes performed on the input device to the processor. The input device is configured for being held and operated with one hand. The input device has a complete basic alphanumeric character set and a plurality of symbols which are actuated by one of at least ten multifunction keys arranged in a grid of three columns by four rows, each of the multifunction keys being configured for single-touch selection of exactly four functions depending on a direction of force thereon. The input device has at least three control keys, each of the control keys being configured to perform a function in conjunction with at least one other key.
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