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- Dec 19, 2005
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“Open-sourcing also helps clarify long‑standing versioning questions. There was never any MS‑DOS 1.0 product sold under that exact name, and historians have had to reconcile IBM's PC‑DOS 1.0, internal Microsoft version numbers, and OEM releases like MS‑DOS 1.25. Having a clearly labeled DOS 1.0 code drop that ties back to the original IBM PC era gives researchers a concrete reference point for that tangle of early DOS builds.
So, if you want a blast from the past, give the code a try. If nothing else, it will help you realize what a long, strange trip it's been from the early days of the PC to today's world, where you have more computing power in your pocket than Gates and crew had in the entire company.”
Source: https://www.zdnet.com/article/microsoft-open-sources-dos-1-0-much-more-than-the-code/