/technologies/embedded/b/blog/posts/microsoft-releases-source-code-for-dos-1-0Developing a DOS operating system in the early days. (Image Credit: Rich Cini/ Microsoft ) Microsoft has been making its early operating system code available to the public over the past few years. In 2018, the tech giant open-sourced MS-DOS 1.25 anden-USTelligent Community 12https://community.element14.com/technologies/embedded/b/blog/posts/microsoft-releases-source-code-for-dos-1-0Thu, 14 May 2026 19:05:02 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:601422c5-4816-4790-a2e1-44573c3c26eaDAB1<p>It is hard to believe that it has been 45 years since DOS 1.0.</p> <p>I always thought that Bill Gates should have sent a check to Gary Kildall every year thanking him for being an idiot so that IBM went to Seattle and gave Microsoft the contract.</p><img src="https://community.element14.com/aggbug?PostID=29746&AppID=7&AppType=Weblog&ContentType=0" width="1" height="1">