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Ballmer said Microsoft's Bing search engine would be the default option for all BlackBerry devices and that its maps would be closely integrated with them.
"This is a shrewd move by RIM. It heightens its competitiveness in mapping and search without direct investment," said CCS Insight analyst Geoff Blaber.
"Microsoft is suddenly gaining some considerable traction in mobile as the industry seeks to counter Google's growing dominance," he said.
RIM also showed off the native email and calendar applications it will add to the PlayBook in coming months as well Android apps.