Chairman and CEO\nDell Computer Corp.Now here\u2019s a r\u017dsum\u017d that wouldn\u2019t make it past HR: One year of college. Worked for one company for 18 years with no promotion or even a boss who could be used as a reference. Unwilling to relocate.In 1983, at 18, Michael Saul Dell began conducting business out of his dorm room at the University of Texas in Austin, selling custom-made PCs and components. A year later, with $1,000 in startup capital, he officially set up his business and dropped out of the university, dashing his parents\u2019 hope for another doctor in the family. Today he runs the second largest (after the HP-Compaq merger) and still fastest-growing PC maker in the world.A company known for its dominance with corporate customers, Round Rock, Texas-based Dell recently went from number five to number one with consumers in just 18 months with the help of quirky advertising and pricing that\u2019s driving the competition completely nuts. And they\u2019re making money. Lots of it.Dell\u2019s continued spectacular performance through the downturn makes the compelling argument that Michael Dell is the greatest entrepreneur of our time. Indisputably brilliant, he seems to have few, if any, interests beyond his family and our industry. But that, of course, is the key. That is why Michael Dell is different from you and me: his single-minded, unwavering focus and obsession for that one thing.Ask him what he\u2019s currently passionate about, thinking to draw him into a conversation about a hobby or a new venture, and he launches into a discussion about his company\u2019s direct sales model. Change tack and ask what, beyond his company, excites him, hoping to hear something about social issues or his family\u2019s considerable philanthropic efforts, and you get a description of the shift from Unix to Linux. Finally, in desperation, ask, "So when you have a bad day at work, what other things do you imagine yourself doing?" and Dell replies, "I\u2019ve been doing this for 18 years, and I have occasional bad days, but I don\u2019t think about doing something else. I think about what I need to do to fix it. I think I\u2019m going all the way. I\u2019m 37 years old, and we\u2019re going to see how great we can make this company."