This suggests, says Mr Dey, that contextual computing needs to be discreet: such systems are, in effect, judging people and trying to influence their behaviour.

戴先生说这表明环境计算必须非常严谨：这样的系统实际上是对人作出判断并影响人的行为。

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This is an example of contextual computing.

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"Instead of being deaf, dumb, and blind sitting on our desks or in our pockets, our computers might be able to observe what we do all day, understand what is important to us, and act as a virtual assistant who helps us on a second-by-second basis, " said Thad Starner, Associate Professor of the Contextual Computing Group at Georgia Tech University.

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