| 摘要 |
A handheld wireless communication device cradleable by an operator during text entry. A display, key field and trackball navigation tool are located on a front face of the device. Alphanumeric input keys include several alphabetic keys with letters arranged in a traditional (QWERTY), but non-ITU Standard E.161 telephone letter layout. A menu key is positioned adjacent to the trackball navigation tool and the at least one key has an arcuate-shaped edge conformance fitting to an arcuate-shaped boundary about the trackball navigation tool. A rotatable ring is provided that surrounds the trackball of the trackball navigation tool. A microprocessor is configured to receive operator commands from the various inputs.
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