| 摘要 |
One or more reading devices are disposed within a hollow case sized and shaped to be held in a user's hand. A supplemental switch is also disposed in the case and is manually activatable by a user, such as by the user's thumb. Logic disposed in the case is connected to a reading device and the supplemental switch for taking a first action when the switch is activated and taking a second action when it is not. The first and second actions may comprise first and second modes of operation of the reading device. When two or more reading devices are provided, the first and second actions may include reading operations of the first and second devices, respectively. Types of reading devices that may be incorporated into embodiments of the invention include bar code scanners, RF ID interrogators, and smart card scanners.
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