Microsoft open-sources MS-DOS 4.00, releases early beta of MS-DOS 4.0 (multitasking)
Today, in partnership with IBM and in the spirit of open innovation, we’re releasing the source code to MS-DOS 4.00 under the MIT license. There’s a somewhat complex and fascinating history behind the 4.0 versions of DOS, as Microsoft partnered with IBM for portions of the code but also created a branch of DOS called Multitasking DOS that did not see a wide release. … ⌘ Read more