[MS-DOS 1.25 & 2.0 Source]

Copyright (c) Microsoft Corporation

All rights reserved.

MIT License

Permission is hereby granted, freeof charge, to any person obtaining a copy of this software and associateddocumentation files (the Software), to deal in the Software withoutrestriction, including without limitation the rights to use, copy, modify,merge, publish, distribute, sublicense, and/or sell copies of the Software, andto permit persons to whom the Software is furnished to do so, subject to thefollowing conditions:

The above copyright notice andthis permission notice shall be included in all copies or substantial portionsof the Software.

THE SOFTWARE IS PROVIDED*AS IS*,WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TOTHE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ANDNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLEFOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE ORTHE USE OR OTHER DEALINGS IN THE SOFTWARE.

<imgwidth="150"height="150"style="float:left"alt="MS-DOS logo"src="https://github.com/Microsoft/MS-DOS/blob/master/msdos-logo.png">

This repo contains the original source-code and compiled binaries for MS-DOS 1.25 and MS-DOS 2.0.

These are the same files[originally shared at the Computer History Museum on March 25th 2014](http://www.computerhistory.org/atchm/microsoft-ms-dos-early-source-code/) and are being (re)published in this repo to make them easier to find, reference-to in external writing and works, and to allow exploration and experimentation for those interested in early PC Operating Systems.

All files within this repo are released under the[MIT (OSI) License](https://en.wikipedia.org/wiki/MIT_License) as per the[LICENSE file](https://githib.com/microsoft/msdos/license.txt) stored in the root of this repo.

The source files in this repo are for historical reference and will be kept static, so please don’t send Pull Requests suggesting any modifications to the source files, but feel free to fork this repo and experiment 😊.

If, however, you’d like to submit additional non-source content or modifications to non-source files (e.g. this README), please submit via PR and we’ll review and consider.

This project has adopted the[Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the[Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact[opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.