Microsoft open-sources MS-DOS 1.0, offering a rare look at PC history
Microsoft has open-sourced the source code for 86-DOS 1.00, the first version of DOS for the IBM PC. This release includes the kernel, development snapshots, and handwritten notes from its creator, Tim Paterson. The artifacts will be displayed at the Interim Computer Museum, providing a unique insight into the origins of MS-DOS and PC history.
- ▪Microsoft has released the source code for 86-DOS 1.00 on its 45th anniversary.
- ▪The release includes handwritten notes from Tim Paterson, detailing the development of DOS.
- ▪Artifacts from this release will be displayed at the Interim Computer Museum.
Opening excerpt (first ~120 words) tap to expand
{ "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": "1", "name": "Home", "item": "https://www.xda-developers.com/" }, { "@type": "ListItem", "position":"2", "name": "Windows", "item": "https://www.xda-developers.com/windows/" }, { "@type": "ListItem", "position":"3", "name": "Microsoft open-sources MS-DOS 1.0, offering a rare look at PC history", "item": "https://www.xda-developers.com/microsoft-open-sources-ms-dos-1-0-offering-rare-look-pc-history/" } ] } Microsoft open-sources MS-DOS 1.0, offering a rare look at PC history By Patrick O'Rourke Published Apr 28, 2026, 3:30 PM EDT Patrick O'Rourke is XDA's News Editor and Entertainment Segment Lead.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at XDA.
Discussion
0 commentsMore from XDA
