Just look at how fast information technology departments swung to servers connecting to PCs, shutting down mainframe and mini-computer data centers and wiping out thousands of green-screen terminals.

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That technology, once reserved for hybrids, saves fuel by shutting down the engine when the vehicle is stopped.

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Both handsets prepare customers for the eventual shutting down of iDEN by offering push-to-talk-to-yourself technology.

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Yahoo said it is shutting down the Summly app, which was downloaded less than one million times, and incorporating its technology into other Yahoo services.

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