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Now Playing: 1-24-14 Marketplace Tech - Mac at 30

Tomorrow marks the 30th anniversary of Apple's Macintosh computer. Plus, today's game of Silicon Tally is set to level expert. And by that we mean that today's guest, who host Ben Johnson will try and stump with numbers from the week's tech news, is Kara Swisher, formerly of All Things D, currently co-executive editor with Walt Mossberg of the new tech news and reviews website Re/Code.