By Miyoung Kim SEOUL (Reuters) - South Korean upstart Infraware Inc is in a David and Goliath battle with software giant Microsoft over a lucrative niche of the mobile office business and just like the diminutive biblical hero, it believes it can win. Infraware already dominates the market for office software applications on Android devices and says it now has a killer strategy to extend that domination to Apple Inc handsets as well by giving its best-selling Polaris app away for free. The contest between the $250 million Korean minnow and the $270 billion U.S. ...



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