The key signal of whether industry or the planet is winning will be how high a price tag we see for carbon.

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Insurers attribute the improvement to the fact that most new cars are now fitted with immobiliser systems which prevent the engines being started without a matching key signal.

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Ministers wanted to signal that in future the key decisions in NHS would be taken by doctors not politicians.

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Meanwhile, just as YouTube is shifting gently away from user-generated content and the long tail, Apple is making key changes that could signal something significant.

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As a key benchmark issue, the auction will signal the onshore expectation for interest rate direction in the near term.

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Holland midfielder Sneijder tested goalkeeper Storari after only six minutes to signal his team's intent while Eto'o had a key role in the following two goals.

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Traders will want to continue to monitor action closely around those key levels as a strong breakout above resistance or below support could signal the next big directional price move in gold.

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If the driver of a General Motors car equipped with its OnStar system locks his key in the car, for example, an emergency centre can transmit a digital signal to unlock the doors.

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The key reason is that by having you come back, the company gets to send a powerful signal to its current employees about how great it is there.

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