After building a disruptive business model to sell personal computers in the '80s and '90s and then seeing that model lose steam, Michael Dell, now 47, came back as the CEO in 2007. He's helped rejuvenate the business, leading its transformation to a broad-based infotech company.
Great ideas are hard to come by. Putting them to work is even harder. Meet the founders who turned concepts into companies and changed the face of business.
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