[ubuntu] Nerd question - basic input device

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http://ubuntuforums.org – Recently I was looking at Plover. (In case you are interested, stenography is a really fast way to type. It got me wondering about alternative input devices. Just as a matter of curiosity, what options other than using a keyboard are available to us that would work in the BIOS and/or installation phases of an OS? Is there any demand for other sorts of input device? (Hardware)