Before Windows introduced its modern GUI system, Microsoft was well-known for its iconic command-line operating system, MS-DOS (Microsoft Disk Operating System) throughout the 1980s and early 1990s.
In context: Back in 1980, Tim Paterson was creating a new operating system he called QDOS or Quick and Dirty Operating System. The system was later renamed 86-DOS, as it was being designed to run on ...
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