I've just read a very cool tech story over at ComputerWorld. Apparently, and Austrian company has demonstrated a "Brain-Computer Interface" (BCI) which enables a user to wear a cap and control a computer through the power of thought... well sort of.
Just like speech recognition the system needs to be trained - which apparently takes a few hours. It does not however read thoughts but measured electrical voltage fluctuations which it maps against it's known training dataset.
Currently it is only able to type about 18 characters a minute, but it is also a massive step forward the system showcased a two years ago which was only capable of measuring binary electrical fluctuation e.g go left/go right control of a cursor.
More details here
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