provides flexibility while minimizing space used: the meaning of the
buttons can change with the screen, and selection involves the natural
behavior of pointing at what's desired.
Handhold systems often have a screen with a "joystick button" for a
pointing device.
The rise of the World Wide Web has given embedded designers another
quite different option: providing a web page interface over a network
connection. This avoids the cost of a sophisticated display, yet
provides complex input and display capabilities when needed, on
another computer. This is successful for remote, permanently installed
equipment such as Pan-Tilt-Zoom cameras and network routers.
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