Tech's greatest wins and most epic comebacks of 2015

PC World: While 2014’s greatest tech achievements were largely about steady iteration to existing products, this year’s highlights bring a greater sense of urgency. It seems every company in tech has suddenly awoken to the rapid expansion the next few years will bring, and is now trying to mark as much territory as possible. Here are the best, most successful examples of how that shook out in 2015.

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