Microsoft has open sourced another bit of computing history this week: The company teamed up with IBM to release the source code of 1988 MS DOS 4.00 , a version better known for its unpopularity, bugginess, and convoluted development history than its utility as a computer operating system. The MS DOS 4.00 code is available on Microsoft MS DOS GitHub page along with versions 1.25 and 2.0, which Microsoft open sourced in cooperation with the Computer History Museum back in 2014 . All open sourc
