Final answer:
DOS stands for Disk Operating System. It is a computer operating system that was popular during the 1980s and early 1990s.
Step-by-step explanation:
DOS stands for Disk Operating System. It is a computer operating system that was popular during the 1980s and early 1990s. DOS is a command-line interface where users could enter commands to execute various tasks, such as managing files and running programs.
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