Reuters
Technology
 - Yahoo buying Tumblr for $1.1 billion, vows not to screw it up
 - Apple to argue for tax reform, defend tax practices on Tuesday
 - Former Nokia software team unveils its first smartphone
 - Britain's Cameron tells Google and others to play fair on tax
 - China trying to manage exposure of corruption online
 - Dell says cannot disclose more information to Icahn yet
 - Shakespeare's sonnets come to life in new app
 - New Xbox more than a game console for Microsoft
 - Infosys to challenge latest tax demand of $105.3 million
 - Online takeout companies GrubHub and Seamless to merge
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