[Yeo Kheng Meng] didn’t cheat by simply running MS-DOS on a modern PC, either: he tested the client on a real 1984 vintage IBM 5155 Portable PC.

In talking to IBM, Bill Gates heard of IBM's predicament for an operating system so he went out and bought one, and hired the guy that created it to turn it into MS DOS. It was one that competed ...

WordStar, an MS-DOS-based word-processing program first released in 1978, can live a little longer thanks to the archiving efforts of one of its biggest fans—Hugo and Nebula award-winning author ...