Bill Gates is a business man, not a programmer and in 1981 he, through his corporation Microsoft, purchased the rights to 86-DOS for 50 thousand dollars. It appeared as a fruitless venture because there were an enormous number of DOSes being distributed at the time. Luckily, Bill Gates made a deal with IBM to license the operating system as PC-DOS in all IBM XT computers. This licensing deal is what made Microsoft famous. And, it wasn't until windows 3 that Microsoft could set themselves apart from the DOS world. It is Bill Gates' appetite for risk that makes him one of the many ButterNutty people we have come to love.