With Apple at the top and Google, Microsoft and IBM not too far behind, tech companies represented one-tenth of global companies in terms of market capitalization, according to a new summary by consultancy PricewaterhouseCoopers.

In an index of big-name companies spanning March 2008 through March 2013 – which included the “Great Recession” and trillions of dollars in revenue swings – PwC put tech companies as a group at the top in terms of most valuable sectors (up 35 percent, to $1.82 trillion) and most improved. In its overall summary, the tech market has been “driven by product innovation and consumerization.”

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