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SAN FRANCISCO - SEPTEMBER 27: A BlackBerry DevCon
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SAN FRANCISCO - SEPTEMBER 27: A BlackBerry DevCon attendee walks by a poster for the new BlackBerry PlayBook during the Blackberry DevCon 2010 on September 27, 2010 in San Francisco, California. RIM President and Co-Chief Executive Officer Mike Lazaridis announced the new BlackBerry PlayBook, a touchscreen tablet, during his keynote address. (Photo by Justin Sullivan/Getty Images)(Credit: Getty/Justin Sullivan)

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Blackberry maker unveils PlayBook tablet

The company that manufactures the BlackBerry, still the dominant phone in corporate circles, thinks its business customers will have room in their briefcases for at least one more device: the PlayBook.