These state-of-the-art touchscreen surfaces are capable of discriminating between (and tracking) multiple objects, human touches, and/or elements of user-reconfigurable mechanical and/or graphical overlays.
Since Apple and Microsoft announced their own multi-touch touchscreen interfaces in 2007, for their iPhone and ‘Surface’ products, there has been significant international interest in this field of research.
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As one of the pioneers of these kinds of interfaces, I was asked in June 2007 to write for The Register about what I thought about these recent commercial developments.