there was nothing that came before it. there was no personal computer industry. so when gates said to ibm, how about this? we'll write you're operating system for your pc, and we'll get a cut of every machine you sell, and in addition, he made sure it wasn't an exclusive license, that he was going to be able to sell the software to ibm, but he was also going to be able to sell the same software to other people, because gates intuited that there would be people build knockoffs of ibm in the pc clones. >> it was a genius move who was still in his 20s. and you've got these guys at ibm in blue suits and dark ties looking at this company microsoft and saying, who cares? software? who cares about software, man? we build big machines. >> ibm did not realize it was essentially handing all this power to this little nerd. >> if you had stayed at harvard a few more years, would this computer revolution pass you by? >> perhaps.