He still oversees the project to this day. MS-DOS, IBM-DOS, and other DOS derivatives were the most popular operating systems for PCs from the first IBM PC in 1981 to around the mid-1990s.

[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. This semi-portable PC/XT model sports a 4.77 MHz ...

They still pack a punch even in 2023, as [Lunduke] is here to show us by running a DOS web server. Take that, nginx! Three letter file extensions for the win! While Microsoft and IBM abandoned DOS ...