During this transition period, Sellers are operating in parallel universes, but not for long.

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To crunch heavy loads, Chevron networks its computers into Linux-based clusters with hundreds of processors operating in parallel.

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The authority added that it had alerted the international aviation community of its airworthiness directive, so that other authorities could take parallel action to cover the fleets operating in their countries.

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When the FAA issues an airworthiness directive, it also alerts the international aviation community to the action so other civil aviation authorities can take parallel action to cover the fleets operating in their own countries.

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In a parallel universe, MeeGo became the standard operating system for netbooks, which became the dominant form of mobile computing.

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While Japan and South Korea are co-operating over travel, security and other arrangements, this still looks like two World Cups running in parallel, rather than a unified tournament.

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