found on wikipedia.org
Although his parents had compelled him to pursue medicine, Dell followed his early interests in business and technology. It is this personal interest that the success he achieved is not in its entirety a surprise. By 1984, the numbers had become overwhelming as Dell's company was celebrating its first full year in business having made sales amounting to USD 6 million. In 1989, he got married to Susan with whom they have born four children. As the millennium was being ushered in, Dell had become a billionaire and besides, his company had opened offices in approximately thirty four countries with a workforce of over thirty five thousand employees. A year later, Dell Computer became the world's larger maker of personal computers displacing Compaq Computer. Despite the fact that Dell was not only extremely private but also infamously shy, he has been able to come out of this cocoon and his fame is presently known by all. In unity the Dells have displayed their willingness to share their wealth through various foundations such as the Susan Dell Foundation.
Read more about Michael Dell and his company here: http://businessideaslab.com/dell-computers/ and find some more detailed information.