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This historic OS was not stored digitally, so a fleet of historians have transcribed the source code from ancient…
Microsoft has released the source code for 86-DOS 1.00, a precursor to MS-DOS, on GitHub to commemorate its 45th anniversary. The code was transcribed by a team of historians led by Yufeng Gao and Rich Cini, as the original source code was not stored digitally. This effort preserves a significant piece of early computing history, including the operating system originally created by Tim Paterson for Seattle Computer Products.
