A picture on a screen that represents a specific command. 命令符號屏幕上代表特殊命令的圖像符號
A device that gives information in a visual form, as on a screen. 顯示器，指示器一種以視覺方式顯示信息的裝置，如熒光屏顯示
A machine for projecting the images of opaque objects or transparencies on a screen. 透反射兩用幻燈機用於將不透明或透明物體的影象投影到屏幕上的機器
Identification of information displayed on a screen for subsequent computer processing, by pointing to it with a mouse. 用滑鼠器(或其它選圖設備)檢取顯示在屏幕上需要的信息，以供計算機做下一步的處理。
