Twitter CEO Tagged As UM Commencement SpeakerThe University of Michigan says that Twitter chief executive Dick Costolo will be the commencement speaker at the school's May 4th graduation ceremony in Michigan Stadium.
Twitter CEO Returns To Alma Mater UMSocial media like Twitter that offer instant reaction to news events has recreated the Greek 'agora' shared meeting space and complemented the traditional news media in unexpected ways, Twitter's CEO said Friday.

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