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Projection keyboard
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<p>A projection keyboard is a form of computer <a href="/facts/Input_device/TXYLUkux">input device</a> whereby the image of a <a href="/facts/Virtual_keyboard/h7dmTg31">virtual keyboard</a> is projected onto a surface: when a user touches the surface covered by an image of a key, the device records the corresponding keystroke. Some connect to Bluetooth devices, including many of the latest smartphone, tablet, and mini-PC devices with Android, iOS or Windows operating system. </p>