... - presenting many problems for designers and users alike. The permanently increasing complexity of in-car electronics and the rapidly growing amount of sensors, actuators and electronic control units, make the data increasingly more difficult to keep secure, correct and failsafe. In a recent survey carried out by Goldman Sachs in America, there are approximately 200 million cars in the United States and an incredible 500 million passenger hours each week is spent inside them. In another survey, Delphi Automotive research found that more than a third of PDA owners use their PDA's whilst driving and that almost half of all US motorists would like the facility to access their e-mail whilst on the road.2 The survey also claimed, that if the current trend continues then in-car voice controlled data systems could become a $30 billion business in less than a decade. Car makers are, of course, nervous about ...

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