Girton Labs Ltd, Girton, Cambridge has developed a novel hand tracking system which has applications such as replacing touch sensors with a non contact system. An array of heat tracking sensors in a tiny 5mm array can track hand movement up and down, left to right at up to 50 times/second. Applications include automobiles, mobile phones, medical and handheld computers. The conventional problems with touch sensors of high cost, fingerprints and obscuring of the screen are reduced. Item from Cambridge Wireless.