DOS - Wikipedia
https://en.wikipedia.org/wiki/DOS
DOS (/dɒs/, /dɔːs/) is a platform-independent acronym for disk operating system which later became a common shorthand for disk-based operating systems on IBM PC compatibles.
Microsoft Disk Operating System
https://www.reddit.com/r/DOS/
For discussion of Microsoft's DOS (and other similar disk operating systems of the time). Feel free to post gaming content, tech support, programs, and whatever else is relevant.