DOS (Disk Operating System) is an operating system primarily used in the early days of personal computing to manage disk storage and file systems. It is known for its command-line interface and was widely used before the advent of graphical user interfaces.
MS-DOS (Microsoft Disk Operating System) is an operating system for x86-based personal computers mostly used from the 1980s to the early 1990s.
An operating system (OS) is a program that controls a computer and makes it possible for users to enter and run other programs. It helps manage hardware resources and provide various services to software applications.
