In March 2014, Microsoft released the source code to MS-DOS 1.25 and 2.0 via the Computer History Museum. The announcement also contains a brief history of how MS-DOS came to be for those new to the subject, and ends with many links to related articles and resources for those interested in learning more.

Today, we're re-open-sourcing MS-DOS on GitHub. Why? Because it's much easier to find, read, and refer to MS-DOS source files if they're in a GitHub repo than in the original downloadable compressed archive file. 

docker: Error response from daemon: hcsshim::CreateComputeSystem 1c11dcf156f978c77f095a247697e61046a057cbbe6e0f4ce379ac3c27a8893e: 
The virtual machine could not be started because a required feature is not installed.
(extra info: {"SystemType":"Container","Name":"1c11dcf156f978c77f095a247697e61046a057cbbe6e0f4ce379ac3c27a8893e","Owner":"docker","IgnoreFlushesDuringBoot":true,"LayerFolderPath":"C:\\ProgramData\\Docker\\windowsfilter\\1c11dcf156f978c77f095a247697e61046a057cbbe6e0f4ce379ac3c27a8893e","Layers":[{"ID":"07980919-a64b-5c53-a9f5-90d601652283","Path":"C:\\ProgramData\\Docker\\windowsfilter\\bafa745f07de7a1225fde00e2a023ef3f3506b0aa860533d698274db8b6470bf"},{"ID":"a61fb5af-c609-53d4-bc44-60dd64782af7","Path":"C:\\ProgramData\\Docker\\windowsfilter\\19fa1b0fe7a7ae21a6759065a777bb97258999e19e807e7585cc04294d280415"},{"ID":"9ab68230-2445-5771-ab79-381a25f39628","Path":"C:\\ProgramData\\Docker\\windowsfilter\\878443b99b40a380ab046bdde15c2e4e3fd550de9bac9dda965608eade6eb57e"},{"ID":"1c3d5a81-0cc7-57fa-80a1-e730452d057c","Path":"C:\\ProgramData\\Docker\\windowsfilter\\4ae8898165beb41737d803086903772e04dd1c4f5bfc3a07f4609066ccf67762"},{"ID":"2f086665-fabf-5ca3-b14b-a36bad45c008","Path":"C:\\ProgramData\\Docker\\windowsfilter\\6f383e273091a5a33427f644820696e6356b1b1cfa7cd662f8477445d2564676"}],"HostName":"1c11dcf156f9","HvPartition":true,"EndpointList":["7C713800-DCBE-4525-99E7-DE82C06F285C"],"HvRuntime":{"ImagePath":"C:\\ProgramData\\Docker\\windowsfilter\\4ae8898165beb41737d803086903772e04dd1c4f5bfc3a07f4609066ccf67762\\UtilityVM"},"AllowUnqualifiedDNSQuery":true}).