Research firm IDC has found third quarter sales of personal computers jumped 2.3 from the same period last year, reports AP.  The industry had expected sales to continue falling after declines in the first half of 2009.  Computer makers have also been reeling from a tough 2008, when holiday sales fell to their lowest in six years.  IDC partly attributes the third quarter jump to robust back-to-school sales.  It ranked HP as the world s biggest computer maker, with Taiwan’s Acer bumping Dell for the number two spot.

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