- 1. On a display device keyboard, a key that passes a signal to a program to call for a particular display operation.; 显示设备中键盘上的一个键,它把一个信号传递给程序,要求作某一特定的显示操作。参阅program access (PA) key。 2. A key that invokes a utility; for example, to perform scrolling or page turning or to display the contents of a print queue. | 调用公用程序的一种按键,例如实现屏幕翻滚、页面转换或显示某一打印队列的内容等。 3. A soft key; a key that can be user programmed; for example, to set terminal operating conditions or to insert a repetitive line of data. | 一种软键;一种能由用户对它进行编程的键;例如设置终端运行状态或插入某一重复的数据行等。
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