This system has high economy because of using itinerant monitor to analogy signals that made by PLC modules, using LED display and scan keyboard as press buttons that made by PLC dynamic I/O modules.

用PLC模块构成多路模拟量巡检，用动态I/O模块实现LED显示及扫描键盘按钮，使系统具有较高的经济性。

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A human reader would scan this receipt, decide on the data it contains, then enter the transaction via the keyboard.

人可以阅读此收据，决定它包含的数据，然后通过键盘输入这次交易。

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Assigned to each key on a keyboard is a unique value called a scan code, a device-dependent identifier for the key on the keyboard.

中文翻译：键盘上的键都分配有一个独一无二的扫描码，即和设备相关的标识符。

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The screen slides open and tilts to reveal a full QWERTY keyboard for fast, comfortable typing, while productivity features such as the ability to sort, scan and manage Outlook email, open and edit the latest Office documents and keep track of the markets with HTC's stocks application, offer new ways to get more out of the business day.

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